Find an integer C that will make the polynomial factorable 32 − 8 + C
HELPPPP I NEED THIS ASAP
Answers
We can factor the polynomial as:-32a^2 - 82a + 31 = 32(a - \frac{1}{2})(a - \frac{31}{32})
.To make the polynomial 32a^2 - 82a + C factorable, we need to find an integer value for C such that the quadratic expression can be factored into two binomials.
To do this, we can use the formula for the discriminant: b^2 - 4ac. Since we want the discriminant to be a perfect square, we can set it equal to some integer k^2 and solve for C:
82^2 - 4(32)(C) = k^2
6724 - 128C = k^2
We can try different values of k and solve for C until we find an integer solution. For example, if we let k = 10, we get:
10^2 = 6724 - 128C
C = 31
To verify that this value of C works, we can factor the trinomial using the X formula:
a = 32, b = -82, c = 31
X = (-b ± sqrt(b^2 - 4ac)) / 2a
X = (82 ± sqrt(82^2 - 4(32)(31))) / 2(32)
X = (82 ± 8) / 64
So, the roots of the quadratic are:
a = 32, X1 = 1/2, X2 = 31/32
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Related Questions
What is x-^2y(x^3y^5)^3 in simplest form for all values of x and y where the expression is defined?
Answers
The simplified form of the expression x⁻²y(x³y⁵)³ is x⁷y¹⁶ for all values of x and y where the expression is defined.
How to determine the expression in the simplest formTo simplify this expression, we need to use the rules of exponents, specifically the rule for raising a power to a power, which states that (aᵇ)ˣ = aᵇˣ.
Using this rule, we can simplify the expression as follows:
x⁻²y(x³y⁵)³
Open bracket
= x⁻²y(x³ˣ³y⁵ˣ³) (apply the rule for raising a power to a power)
Evaluate
= x⁻²y(x⁹y¹⁵)
Apply the law of indices in multiplying again
x⁷y¹⁶
Hence, the solution is x⁷y¹⁶
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Determine the total resistance for the current
Answers
The total resistance for the current is 432900 ohms.
What is resistance?The obstruction to current flow in an electrical circuit is measured by resistance. The Greek letter omega () represents the unit of measurement for resistance, known as ohms. Georg Simon Ohm (1784–1854), a German scientist who investigated the connection between voltage, current, and resistance, is the name given to the unit of resistance. Ohm's Law is attributed to him as its creator.
The power in parallel connection is calculated as:
Peq = P1 + P2 / (P1)(P2)
Peq = 250 + 150 / (250)(150)
For P3 and P4:
Peq2 = P3 + P4 / (P3)(P4)
Peq2 = 250 + 150 / (250)(150)
Now, the two are in series thus,
P = 250 + 150 / (250)(150) + 250 + 150 / (250)(150)
P = 2(250 + 150 / (250)(150))
P = 0.0213
The power formula is given as:
P = V(V) / R
0.0231 = (100)(100)/R
R = 432900 ohms.
Hence, the total resistance for the current is 432900 ohms.
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simplify and find the value of 3(a square +5ab) -5a squared - 12ab , a = 2 & b = 3
Answers
Answer:
10
Step-by-step explanation:
Given [tex]3(a^{2} +5ab) -5a^{2} -12ab[/tex]
Substitute the values:
[tex]3((2)^{2} +5 * 2 * 3) - 5 (2)^{2} - 12(2)(3)[/tex]
3(4+30) - 5(4) - 12x6
3(34) - 20 - 72
102 - 92
= 10
Find the surface area of the sphere. Round your answer to the nearest hundredth .
Answers
Rounding to the nearest hundredth, the surface area of the sphere is approximately 331.81 square meters.
What is surface area ?
Surface area is the measure of the total area that the surface of an object occupies. It is a two-dimensional measurement, typically expressed in square units, such as square meters (m²) or square feet (ft²).
The surface area (A) of a sphere with diameter d is given by the formula:
A = 4π(d/2)²
where π (pi) is a mathematical constant approximately equal to 3.14.
Substituting the given value of the diameter d = 18.3m into the formula, we get:
A = 4π(18.3/2)²
A = 4π(9.15)²
A = 4π(83.7225)
A ≈ 331.81
Therefore, rounding to the nearest hundredth, the surface area of the sphere is approximately 331.81 square meters.
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One Solution
8x – 2 – 5x + 7 =
✓X+
Y
Answers
The solution to the equation 8x - 2 - 5x + 7 = 0 is x = 15/3. This equation can be solved by using the distributive property and combining like terms.
What is distributive property?Distributive Property is a mathematical property that allows the distribution of a multiplication operation over an addition or subtraction operation. It states that the multiplication of a sum by a number is equal to the sum of each addend multiplied by that number. This property is used to simplify equations and break down complex problems into easier ones. It can be expressed as a(b + c) = ab + ac.
8x - 2 - 5x + 7 = 0
This equation can be solved by using the distributive property and combining like terms. The distributive property states that when we multiply a number by a sum or difference of two or more numbers, we can distribute the number to each individual number and then add or subtract the results.
In this equation, we can apply the distributive property to the left side of the equation by multiplying the 8x and -5x terms by the sum of -2 and 7. This gives us the equation 8x(-2 + 7) - 5x(2 + 7) = 0.
After distributing the terms, we can then combine like terms by adding the 8x and -5x terms together. This gives us the equation 3x(-2 + 7) = 0.
Finally, we can solve for x by setting the coefficient of x equal to zero. Therefore, 3(-2 + 7) = 0, or -6 + 21 = 0. Rearranging the equation gives us x = 15/3.
Therefore, the solution to the equation 8x - 2 - 5x + 7 = 0 is x = 15/3.
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(a) find the slope of the line and (b) interpret the slope.
for every 5-unit change in x, the change in y is ? units
Answers
The slope of the line would be 0.4.
For every 5-unit change in x, the change in y is 2 units.
How to find the slope of a line ?The slope of a line is a measure of how steeply it rises or falls. It is the ratio of the change in the vertical direction (y) to the change in the horizontal direction (x) between any two points on the line.
The slope of a line can be found by the formula :
= ( Y2 - Y1 ) / ( X 2 - X1)
= ( 2 - 0 ) / ( 5 - 0 )
= 2 / 5
= 0. 4
This is for every 1 unit change in x. For a 5 unit change in x, the change in y is:
= 0. 4 x 5
= 2 units
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1.Find the order of the ARIMA process a. ARIMA(2, 1, 3) b.ARIMA(2, 0, 3) c.ARIMA(3, 0, 2) d.ARIMA(3, 1, 2) e.ARIMA (3,3,0) 2. If a relationship between two variables is called statistically significant, it means the investigators think the variables are: a.related in the sample due to chance alone. b.not related in the population represented by the sample. c.None of the above d.related in the population represented by the sample. e.very important.
Answers
If a relationship between two variables is considered statistically significant, it indicates that the variables are related in the population represented by the sample.
The order of the ARIMA process:a. ARIMA(2, 1, 3) has an order of 6b. ARIMA(2, 0, 3) has an order of 5c. ARIMA(3, 0, 2) has an order of 5d. ARIMA(3, 1, 2) has an order of 6e. ARIMA (3,3,0) has an order of 3Therefore, the order of the ARIMA process for each of the given values is: ARIMA(2,1,3) is 6, ARIMA(2,0,3) is 5, ARIMA(3,0,2) is 5, ARIMA(3,1,2) is 6, and ARIMA (3,3,0) is 3.2. If a relationship between two variables is called statistically significant, it means the investigators think the variables are related in the population represented by the sample.The correct option is d. related in the population represented by the sample.Statistical significance indicates that there is a very low probability that a pattern in the data appeared by chance, rather than a real relationship between the variables. Therefore, if a relationship between two variables is considered statistically significant, it indicates that the variables are related in the population represented by the sample.
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Because both distributions, visualization (V) and no visualization (NV), are skewed, the psychologists conducted a simulation to test for a difference in medians rather than means. For each trial of the simulation, the 20 values of the total number of attempts observed in the experiment were combined into one group and then randomly split into two groups of 10. The difference in the medians (V-NV) of the groups was calculated for each trial. The following dotplot shows the difference in the medians for 100 trials of the simulation. Using the observed difference in medians (V−NV) and the results of the simulation, estimate a p-value for a test for the difference in medians. Show the work needed to calculate this p-value
Answers
We can compare the observed difference in medians between the V and NV groups to the difference in medians generated from the simulation in order to estimate a p-value for a test for the difference in medians.
We can count the number of simulation trials where the median difference is larger than or equal to the observed median difference in order to determine the p-value (V-NV). Assume that the median difference that was recorded is 5 (V-NV = 5).
Just a small number of trials, as shown by the dotplot, have median differences higher than or equal to 5. These trials can be counted manually or with software like R or Python. Say we discover 4 trials where the median difference is higher than or equal to 5.
The p-value is then determined as the percentage of simulation trials in which the median difference is larger than or equal to the observed median difference. The p-value in this instance is 4/100 = 0.04. As a result, since the p-value is lower than the significance level, we may say that the observed difference in medians is statistically significant at the 0.05 level.
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First, how long will it take for the music player to fall to the bottom of the ravine? Solve the equation and find the values of t. (2 points: 1 point for each value)
Answers
The equation of the ravine time function is a quadratic equation, the time, t that will take for the music player to fall to the bottom of the ravine is equals to the 1.5 seconds.
We have the construction workers likes to listen to music on the job. The time it takes for the music player to fall from the bridge to the bottom of the ravine can be modeled by the following
equation, t = √(8t+24)/16 --(1)
where t--> the amount of time since the construction worker dropped his music player. Now, we have to solve equation (1). Squaring both sides in equation (1)
=> t² = (√(8t + 24)/16)
=> t² = [((8t + 24)/16)½]²
=> t² = ( 8t + 24)/16
Cross multiplication
=> 16t² = 8t + 24
=> 16t² - 8t - 24 = 0 --(2)
which is a quadratic equation with variable 't'. To solve the quadratic equation or value of t, we use "quadratic formula". The quadratic equation formula to solve the equation ax² + bx + c = 0 is x = [-b ± √(b² - 4ac)]/2a. Here we obtain the two values of x. Now, comparing the equation (2) with
second order equation, ax² + bx + c = 0, we get a = 16 , b = -8 , c = -24
So, t = [-b ± √(b² - 4ac)]/2a
=> t = [ -(-8) ± √((-8)² - 4×16×(-24))]/2×16
=> t = [8 ± √64 + 1536 ]/32
=> t = ( 8 ± √1600)/32
=> t = (8 ± 40)/32
either t = (8 + 40)/32 or t = (8 - 40)/32
either t = 48/32 or t = -32/32 = -1
either t = 3/2 = 1.5 or t = -1
but time, t cannot be equal to negative value. So, the required time value, t is 1.5 seconds.
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Complete question:
One of the construction workers likes to listen to music on the job. Unfortunately, he also has a bad habit of accidentally dropping his music player into the ravine! Luckily, his daughter is good with physics and has built a safety balloon for his latest music player that will release after the music player has been falling for 1 second.
The time it takes for the music player to fall from the bridge to the bottom of the ravine can be modeled by the following equation,t = √(8t+24)/16
where tis the amount of time since the construction worker dropped his music player. First, how long will it take for the music player to fall to the bottom of the ravine?
Solve the equation and find the values of t. (2 points: 1 point for each value)
You breed dogs and notice they usually breed more male puppies than females. Let's test the hypothesis that each puppy has an equal chance of 50% of being either male or female versus the alternative that the chance of a male puppy is greater. You find the p-value to be 0.003. Which of the following do you have for rejecting H0?
a. Insufficient evidence b. Some evidence c. Strong evidence d. Very strong evidence
Answers
In prοbability fοr rejecting H0 we have a) insufficient evidence.
What is prοbability?Prοbability is a way οf calculating hοw likely sοmething is tο happen. It is difficult tο prοvide a cοmplete predictiοn fοr many events. Using it, we can οnly fοrecast the prοbability, οr likelihοοd, οf an event οccurring. The prοbability might be between 0 and 1, where 0 denοtes an impοssibility and 1 denοtes a certainty.
Accοrding tο simulatiοn, the prοbability οf having 13 male puppies οr mοre is
the frequency οf 13 male puppies οr mοre/tοtal frequency=3/1000=0.003
Our οbserved οutcοme is 13/15=0.866
Let p be the pοpulatiοn prοpοrtiοn οf males viz 0.5. The cοrrect null and alternate hypοthesis fοr abοve test
[tex]\\H_0:p=0.5\\ H_1:p > 0.5[/tex]
We are testing if the proportion of males in οur sample is greater than 0.5.
The test statistic z is
[tex]z=\frac{\hat{p-p_0}}{\sqrt{\frac{p_0(1-P_0)}{n}}}[/tex]
Where P0 is the null hypοthesized proportion i.e. when H0:P=P0
[tex]P_0=0.5\ and\ \hat{p}=13/15=0.8667[/tex]
n= 1 because we choοse only 1 pair of dogs.
[tex]z=\frac{\hat{p-p_0}}{\sqrt{\frac{p_0(1-P_0)}{n}}}[/tex]
[tex]\\z=\frac{0.8667-0.5}{\sqrt{\frac{0.5*0.5}{1}}}[/tex]
z=0.7334
P-value= P(Z>0.7334)=0.232
We wοuld have to reject H0 if P-value<0.01 or Z>2.32
But that's nοt the case, So we don't reject the null hypothesis.
We conclude abοut H0 that there is not sufficient evidence to support the claim that proportion of males is greater than 0.5. We fail tο reject the null hypοthesis.
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According to an article in Travel & Leisure, an average plot of land in Spain’s San Martin wine-producing region yields 600 bottles of wine each year.10 Assume this average is based on a random sample of 25 plots and that the sample standard deviation is 100 bottles. Give a 95% confidence interval for the population average number of bottles per plot.
Answers
We can say with 95% confidence that the true average number of bottles per plot in Spain’s San Martin wine-producing region is between 400 and 800 bottles.
The average is worth how much?Calculated by adding up all the numbers and dividing the result by the total number of figures supplied, the average is the middle value of the provided data set. A lot of data can be displayed using the average value, which is a numerical value.
For a confidence interval around the population mean, we can use the following formula:
CI = x + z*(σ/√n)
Where: x=600 bottles, sample mean
Standard deviation for the population (unknown)
25 is the sample size, while 1.96 is the critical number for a 95% confidence interval (from the standard normal distribution table)
We apply the formula: to determine the margin of error.
ME = z*(σ/√n)
With the sample standard deviation (s) and the following formula, we can find the population standard deviation ():
s = σ/√n
σ = s*√n
= 100*25 is 500 bottles.
When we enter all values into the calculation for the confidence interval, we obtain:
CI = 600 + 1.96*(500/√25)
CI = 600 + 1.96*100
CI = (400, 800) (400, 800)
The true average number of bottles per plot in Spain's San Martin wine-producing region is therefore between 400 and 800 bottles, and we can assert this with 95% confidence.
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The complete question is
According to an article in Travel & Leisure, an average plot of land in Spain’s San Martin wine-producing region yields 600 bottles of wine each year.10 Assume this average is based on a random sample of 25 plots and that the sample standard deviation is 100 bottles. Give a 95% confidence interval for the population average number of bottles per plot.
if f(x)=2x²+3 and g(x)=x²-7 find (f+g)(x)
Answers
Answer: (f+g)(x) = 3x^2-4
Select your response (a to e), and provide a 150 to 200 word justification, clearly stating and explaining any relevant formulas.
Question:
With reference to estimation in statistics, the larger the sample size:
a. the wider the confidence interval
b. the lower the degree of precision of the confidence interval
c. a and b
d. the smaller the standard error
e. a and d
Answers
The option D is the correct answer: the smaller the standard error, the larger the sample size.
Answer:Option D: The smaller the standard errorExplanation:Estimation in statistics is the process of using data from a sample to make inferences about the characteristics of a population. In general, the larger the sample size, the more reliable the estimate of the population parameter will be. The smaller the standard error, the more precise the estimate is likely to be. The standard error is the standard deviation of the sampling distribution of the sample mean, and it measures the variability of the sample means that are computed from the different samples that could be drawn from the population.The standard error of the mean is an estimate of the standard deviation of the sampling distribution of the mean. It is a measure of how much the sample mean is likely to vary from the true population mean. The standard error is given by the formula σ / sqrt(n), where σ is the population standard deviation and n is the sample size. As the sample size increases, the denominator of this formula increases, which means that the standard error decreases. Therefore, option D is the correct answer: the smaller the standard error, the larger the sample size.
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What mixed number is equal to 15/8
Answers
Answer:
1 7/8
Step-by-step explanation:
Sorry if this is wrong <3
The circumference of the hub cap of a tire is 77. 93 centimeters. Find the area of this hub cap. Use 3. 14 for pi. Use pencil and paper. If the circumference of the hub cap were smaller, explain how this would change the area of the hub cap. PLEASE HELP IT'S DUE IN 1 HOUR
Answers
A = 483.42 cm^2
Step by step solved:
To find the area of the hub cap, we can use the formula for the circumference of a circle and rearrange it to solve for the radius:
C = 2πr
r = C / 2π
We can substitute the given circumference of 77.93 centimeters and use 3.14 for π:
r = 77.93 cm / (2 × 3.14) ≈ 12.41 cm
Now that we have the radius, we can use the formula for the area of a circle:
A = πr^2
Substituting the value of r we found, we get:
A = 3.14 × (12.41 cm)^2 ≈ 483.42 cm^2
Therefore, the area of the hub cap is approximately 483.42 square centimeters.
Explanation to the Answer:
If the circumference of the hub cap were smaller, the radius of the hub cap would also be smaller, since they are directly proportional. As a result, the area of the hub cap would also be smaller, since it is proportional to the square of the radius.
Henry's banks said they will put 20% interest annually if he keeps at least $5,000 in his savings account. How much money in interest will the bank put Henry's account?
Answers
The amount of money that in the interest will the bank put Henry's account is $1000
If Henry keeps at least $5,000 in his savings account, the bank will put a 20% interest on it annually.
To find out how much interest Henry will earn, we can use the formula:
Interest = Principal x Rate
Where the,
Principal is the amount of money , Henry keeps in his savings account, which is $5,000 or more.
Rate is the interest rate, which is 20% or 0.20 in decimal form.
So, the interest Henry will earn is:
Interest = $5,000 x 0.20
Interest = $1,000
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In Evan's white gold wedding ring, the ratio of nickel to gold is 3 to 13. If the ring contains 4. 16 oz of gold, how much nickel does it contain?
Answers
The wedding ring contains a total of 18 oz (3.32 oz nickel and 14.68 oz gold) and the weight of nickel in the ring is 3.32 oz.
To solve this problem, we need to first find the total weight of the wedding ring. We know that the ratio of nickel to gold in the ring is 3:13, which means that the total ratio of nickel and gold in the ring is 3 + 13 = 16.
Since we are given that the ring contains 4.16 oz of gold, we can use this information to find the total weight of the ring. To do this, we can use a proportion:
Gold weight / Total weight = Gold ratio / Total ratio
Plugging in the values we know, we get:
4.16 / Total weight = 13 / 16
Simplifying this equation, we can cross-multiply to get:
13(Total weight) = 4.16 * 16
Solving for Total weight, we get:
Total weight = 3.32 oz of nickel and 14.68 oz of gold.
Now we can find the weight of nickel in the ring by subtracting the weight of gold from the total weight:
Weight of nickel = Total weight - Weight of gold
Weight of nickel = 3.32 - 0
Weight of nickel = 3.32 oz
Therefore, the ring contains 3.32 oz of nickel.
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Parallelogram Property 4 The diagonals of a parallelogram bisect each other. Show Mel Given: Parallelogram CURE with diagonals bar (CR) and bar (UE) Prove bar (CR) and bar (UE) bisect each other. Proo
Answers
Therefore , the solution of the given problem of parallelograms comes out to be C and R are equally distanced from point N, the midpoint of UE and RN Equals NC.
How do parallelograms function?In Euclidean mathematics, a simple quadrilateral of two sets of equal distances is referred to as a parallelogram. In a specific kind of quadrilateral known as a parallelogram, both set of opposite sides are straight and equal. There are four types of parallelograms, 3 of which are each mutually exclusive. Rhombuses, parallelograms, squares, but also rectangles are the four distinct shapes.
Here,
We must demonstrate that OM = MR in order to establish that O is CR's middle.
=> CO / OU Equals RC / UE
This solution can be rearranged to account for RC:
=> RC Equals UE * (CO / OU)
But we also understand that OU = CO (since they are diagonals of the same parallelogram). Therefore:
=> RC = UE
This indicates that point M, the CR's centre, is equally spaced from C and U. Or put another way, OM Equals MU.
To demonstrate that O is also the midpoint of UE, we can use a similar argument.
Triangles CRU and EUC are comparable to one another (by AA resemblance), so we have:
=> UE/CR equals UC/CR
To solve for UE, rearrange this equation as follows:
=> UE = UC
As a result, C and R are equally distanced from point N, the midpoint of UE. That is to say, RN Equals NC.
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There are 12 cookies in a jar. If joe ate 2/3 of them and peggy ate 1/3 of them,who are more?
Answers
Both fractions have the same denominator so we look at the numerator
John’s numerator is 2
Peggy’s numerator is 1
The person who ate more is Joe.
What are Fractions?Fractions are type of numbers which are written in the form p/q, which implies that p parts in a whole of q.
Here p, called the numerator and q, called the denominator, are real numbers.
Total number of cookies = 12
Fraction that Joe ate = 2/3
Fraction that Peggy ate = 1/3
From the fractions itself, we can say that Joe ate more since the numerator is bigger for the fraction that Joe ate.
Number of cookies that Joe ate = 2/3 × 12 = 8
Number of cookies that Peggy ate = 1/3 × 12 = 4
Hence the number of cookies is more eaten by Joe.
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Is it growth or decay?
A= ?
B= ?
Wat is the Equation?
Answers
The equation is y = 27(1/3)^x and the type is a decay function
How to determine the equation and the typeFrom the graph, we have the following sequence that can be used in our computation:
27, 9, 3....
The above definitions imply that we simply multiply 1/3 to the previous term to get the current term
This means that the function reduces
So, it is a decay function
For the equation, we have
y = ab^x
Where
a = y when x = 0
So, we have
y = 27(b)^x
Using the point, we have
27(b)^1 = 9
So, we have
b = 1/3
So, the equation is y = 27(1/3)^x
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Jason is wanting to rent a hot air balloon for the afternoon and has a couple options to choose from.
Balloons-R-Us charges a one-time fee of $65 plus $32 per hour. Sky Balloons charges $26 per hour plus an $83 one-time fee.
After how many hours would the companies have the same total cost?
A. 2 hours
B. 3 hours
C. 4 hours
Answers
Answer:
3 hours.
Step-by-step explanation:
You can write the equations 65+32x=83+26x, then solve.
exercises 1 - 6 refer to the diagram shown .
Answers
Using the diagram of the circle given above, the value of the parts of the circle is as follows:
1.) Minor arc = Arc AB
2.) Major arc = Arc ACB
3.) Semicircle = AC
4.) Two central angles = 40° and 320°
5.) Arc AB = < 180°
6.) Arc ACB = > 180°
What is a major and minor arc of a circle?The minor arc of a circle is defined as part of the circle that is less than 180° that connects two points on the circumference of a circle.
The major arc of a circle is defined as the part of the circle that is greater than 180° that connects two points on the circle of a circle.
A semi circle is defined as exactly half of a circle which has a total of 180°.
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PLEASE SHOW WORK!!!!!!!!!
Answers
The population size of the bacteria strain after 3 hours of growth, starting from an initial population size of 20, is 20,000.
Exponential growth: what is it?Exponential growth is a particular form of growth pattern in which a quantity's rate of expansion is proportionate to its present size. Several natural and man-made processes, including population expansion, compound interest, and the spread of contagious illnesses, exhibit exponential growth. Rapid and accelerating growth, in which the amount grows over time at an ever-increasingly quicker pace, are the hallmarks of exponential growth.
The exponential growth function is given as:
Nn = N0 * rⁿ
Nn is the population size at time n,
N0 is the initial population size,
r is the growth factor, and
n is the time interval.
Substituting the values we have:
N3 = 20 * 10³
N3 = 20,000
Hence, the population size of the bacteria strain after 3 hours of growth, starting from an initial population size of 20, is 20,000.
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Two similar cone, surface area of cone a is 2m2, surface of cone b is 4. 5m2. Workut raduim of cone a: radius of cone b
Answers
The radius of cone A is √(2/π) and the radius of cone B is √(4.5/π).
The surface area of a cone is given by
[tex]A=\pi r^2 + \pi rL[/tex]
, where r is the radius and L is the slant height.
In the case of cone A, we have A = 2m2 and in the case of cone B,
we have A = 4.5m2.
Using the equation above, we can solve for the radius of cone A and cone B.
For cone A: [tex]2 = \pi r^2 + \pi rL[/tex],
so r = √(2/π)
For cone B: [tex]4.5 = \pi r^2 + \pi rL[/tex],
so r = √(4.5/π)
Therefore, the radius of cone A is √(2/π) and the radius of cone B is √(4.5/π).
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A student used factor by grouping to factor the expression below. How can you tell that the student made an error when factoring? explain the error.
students work:
6x^2 - x - 12
6x^2 - 9x + 8x - 12
3x(2x - 3)-4(-2 + 3)
Answers
The student made an error when factoring because they did not factor the expression correctly. The correct factoring of the expression is 6x^2 - x - 12 = 6x(x - 2) - 3(4).
What is common factor?A common factor in math is a number that can be divided into two or more numbers without a remainder. For example, the common factors of 10 and 15 are 1, 5, and 10. The greatest common factor (GCF) is the largest number that divides both numbers evenly. In this example, the GCF of 10 and 15 is 5. Common factors are useful for simplifying fractions, solving equations, and finding the lowest common multiple.
When factoring by grouping, it is important to remember that the factors of the first and last terms of the expression must multiply to equal the middle terms. In this example, the first and last terms are 6x^2 and -12 respectively. These numbers do not multiply to equal -x, which is the middle term.
The student should have factored the expression by dividing the first and last terms by the greatest common factor (GCF). The GCF of 6x^2 and -12 is 6x, so the expression can be factored as 6x(x - 2) - 3(4).
When factoring by grouping, it is also important to remember to factor out the common factor first. In this example, the common factor is 3x, so the expression should be factored as 3x(2x - 3) - 4(2 - 3).
In conclusion, the student made an error when factoring the expression because they did not factor the expression correctly. The proper way to factor the expression is to divide the first and last terms by the greatest common factor and factor out the common factor first.
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The dimensions of a rectangular prism are 1.5 feet by 6 feet, by 2 feet. What is the volume of the rectangular prism? Pls need help
Answers
The calculated value of the volume of the rectangular prism is 18 cubic feet.
What is the volume of the rectangular prism?From the question, we have the following parameters that can be used in our computation:
The dimensions of a rectangular prism are 1.5 feet by 6 feet, by 2 fee
The volume of a rectangular prism is given by the formula:
V = l x w x h
where l, w, and h are the length, width, and height of the prism, respectively.
In this case, the length is 1.5 feet, the width is 6 feet, and the height is 2 feet.
Therefore, the volume is:
V = 1.5 ft x 6 ft x 2 ft
V = 18 cubic feet
So the volume of the rectangular prism is 18 cubic feet.
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The mean weight of 32 students is 98.3 lb. If the students could all stand on the scale together, what would their total weight be?
Answers
The mean weight of 32 students is 98.3 lb. The total weight of 32 students would be 3145.6 lb.
To find the total weight of 32 students, we need to multiply the mean weight of each student by the number of students. In this case, the mean weight of each student is 98.3 lb.
So, to find the total weight, we can use the formula:
Total weight = Mean weight × Number of students
Total weight = 98.3 lb × 32
Total weight = 3145.6 lb
Therefore, the total weight of 32 students would be 3145.6 lb.
It's important to note that the mean weight is the average weight of the 32 students. It is calculated by adding up the weight of each student and then dividing by the total number of students. So, if the weights of the students are evenly distributed, then the mean weight is a good estimate of the total weight. However, if the weights are not evenly distributed, then the total weight may be slightly different.
Overall, it's important to use statistical measures such as mean, median, and mode to gain insights into data and make informed decisions.
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Suppose you rent a limousine for a formal reception. The bill for the evening is $50.00. A tax of 7% will be added, and you want to tip the chauffeur 17% for excellent driving. How much will you pay in total?
Answers
Answer:
$62.00
Step-by-step explanation:
7% of 50 is 3.5. 17% of 50 is 8.5. 8.5+3.5 is 12. 50+12= 62.
a. Write a similarity statement to show which triangles are similar.
b. Explain how you know that the triangles are similar.
Answers
After answering the provided question, we can conclude that As a result, the triangles are similar according to the AA and SAS similarity criteria.
What precisely is a triangle?A triangle is a closed, double-symmetrical object that consists of three line segments called ends of the spectrum that intersect at three points called vertices. Triangles can be distinguished by their sides and angles. Triangles can be equilateral (equal factions), isosceles, or scalene based on their sides. Triangles are classified as acute (all angles less than 90 degrees), okay (one angle equal to 90 degrees), or orbicular (all angles greater than 90 degrees) (all angles greater than 90 degrees). The region of a triangle can be calculated using the formula A = (1/2)bh, where an is the neighbourhood, b is the triangle's base, and h is its height.
a. Here is a similarity statement that shows which triangles are similar:
Triangle ABC is the same as triangle DEF.
b. The triangles are similar in that they both have:
Angle-Angle (AA) similarity: Both triangles have two congruent corresponding angles, namely angle A and angle D and angle C and angle F.
Side-Angle-Side (SAS) similarity: The triangles have a pair of proportional length corresponding sides, AB and DE, and another pair of proportional length corresponding sides, BC and EF.
As a result, the triangles are similar according to the AA and SAS similarity criteria.
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Peter decides to invest $1,200,000 in a period annuity that earns 4.6% APR
compounded monthly for a period of 20 years. How many years will it take
Peter to earn back his initial investment?
OA. 12 years
OB. 12.5 years
O C. 13.1 years
D. 11.3 years
Answers
Answer: 7,656.46
Step-by-step explanation:
Given is the Present Value of annuity, PV = 1,200,000 dollars.Given that 4.6% APR compounded monthly i.e. r = 4.6%/12 = 0.003833Given that 20 years of investment i.e. N = 20x12 = 240It says to find monthly income from the annuity.We know the formula for Periodic Payment (when PV is known) is given as follows :-Hence, Monthly Income would be
7,656.46 dollars.
It will take Peter approximately 12.5 years to earn back his initial investment.
What is an expression?Mathematical expression is defined as the collection of the numbers variables and functions by using operations like addition, subtraction, multiplication, and division.
For calculate the number of years it will take Peter to earn back his initial investment of $1,200,000 with an APR of 4.6% compounded monthly for a period of 20 years, we can use the formula for the future value of an annuity:
⇒ FV = P ((1+r)ⁿ - 1) / r
Where: P = Payment per period
r = Interest rate per period
n = Number of periods
We need to solve for n, so we can rearrange the formula as;
n = (log(FV × r/P + 1)) / log(1+r)
Plugging in the given values, we get:
P = $6,601.34 ($1,200,000 / (12 × 20))
r = 0.046 / 12 = 0.00383333
FV = $1,200,000
n = (log(1,200,000*0.00383333/6,601.34 + 1)) / log(1+0.00383333)
n ≈ 12.5 years
Therefore, it will take Peter approximately 12.5 years to earn back his initial investment. The answer is option B.
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