The graphs of f of x equals cosine of the quantity x over 2 and g of x equals square root of 3 minus cosine of the quantity x over 2 intersect on the interval [0, 360°) at: D. 30° and 330°.
What is a point of intersection?In Mathematics and Geometry, a point of intersection simply refers to the location on a graph where two (2) lines intersect or cross each other, which is primarily represented as an ordered pair containing the point that corresponds to the x-coordinate (x-axis) and y-coordinate (y-axis) on a cartesian coordinate.
In this context, we can logically deduce that the point of intersection of the graphs would be at function f(x) = function g(x):
[tex]cos(\frac{x}{2} )=\sqrt{3} -cos(\frac{x}{2} )\\\\\sqrt{3}=cos(\frac{x}{2} ) + cos(\frac{x}{2} )\\\\\sqrt{3}=2cos(\frac{x}{2} )\\\\cos(\frac{x}{2} )=\frac{\sqrt{3}}{2} \\\\cos(\frac{x}{2} )=\frac{\sqrt{3}}{2}\times \frac{\sqrt{3}}{\sqrt{3}} \\\\cos(\frac{x}{2} )= \frac{3}{2\sqrt{3}}[/tex]
x/2 = 15
x = 15(2)
x = 30
x/2 = 165
x = 2(165)
x = 330.
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460134. 2722596. Qx3zqy7 a shuttle van picks up passengers and drives them to a destination, where they leave the van. Keep a count of the boarding passengers, but don't allow boarding if the van is full. Update the odometer when the van drives
By using a counting method, the driver can keep track of how many passengers have boarded the van, and by measuring the distance driven, they can update the odometer.
The formula for calculating the total number of passengers that can board a shuttle van is:
Total Passengers = Number of Seats in the Van - 1 (Driver)
For example, if the van has 10 seats, the total number of passengers that can board the van is 9 (10 - 1).
To keep track of how many passengers have boarded the van, we can use a simple counting method. Each time a passenger boards the van, the counter should be increased by 1. When the counter reaches the maximum number of passengers the van can hold, the driver should not allow any more passengers to board.
To update the odometer, the driver can measure the distance the van has driven since the last update. This can be done by using a GPS device or by measuring the distance between two points on a map. The total number of miles driven since the last update can then be added to the previous odometer reading to find the new odometer reading.
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If you use a 0.02 level of significance in a (two-tail) hypothesis test, what is your decision rule for rejecting a null hypothesis that the population mean is 950 if you use the Z test? Which of the following decision rules is correct?
A. Reject H0 if -2.05 < Zstat +2.05.
B. Reject H0 if Zstat < -2.05 or Zstat > + 2.05.
C. Reject H0 if Zstat< -2.33 or Zstat > +2.33.
D. Reject H0 if -2.33 < Zstat < +2.33.
The correct decision rule for a test hypothesis with a significance level of 0.02, with two tails, is given as follows:
C. Reject H0 if Zstat< -2.33 or Zstat > +2.33.
What is the relation between the p-value and the conclusion of the test hypothesis?The decision regarding the null hypothesis depends on if the p-value is less or more than the significance level:
If it is more, the null hypothesis is not rejected, meaning that the result obtained on the research study is not statistically significant.If it is less, it is rejected, meaning that the result obtained on the research study is statistically significant.For a two-tailed test with a significance level of 0.02, the critical value is given as follows:
z = 2.33.
Hence the decision rule is given as follows:
|z| < 2.33 -> p-value < 0.02 -> do not reject H0.|z| > 2.33 -> p-value > 0.02 -> reject H0.Hence option C is the correct option for this problem.
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one of the volunteers whose sam 77 test result was positive will be chosen at random. to the nearest 0.001 , what is the probability the chosen volunteer does not possess yq 77 ?
The probability the chosen volunteer does not possess yq 77 is 0.655 (nearest to three decimal places).
Given information: One of the volunteers whose sam 77 test result was positive will be chosen at random.
To find: The probability the chosen volunteer does not possess yq 77.
Let P(Y) be the probability that a volunteer possesses yq77 and P(Y') be the probability that a volunteer does not possess yq77. It is given that out of 150 volunteers, 77 tested positive for SAM.
Therefore, the probability of testing positive for SAM is:
P(SAM) = number of volunteers who tested positive for SAM / total number of volunteers= 77/150
Now, using the probability law of total probability, we can find the probability of a volunteer not possessing yq77, as follows:
P(Y') = P(Y'|SAM) P(SAM) + P(Y'|SAM') P(SAM')
It is given that yq77 is found in 60% of volunteers who tested positive for SAM, and in 30% of those who did not test positive for SAM.
Therefore:
P(Y'|SAM) = 0.6, P(Y'|SAM') = 0.3
Now, substituting the given values in the equation,
P(Y') = (0.6 × 77/150) + (0.3 × 73/150)≈ 0.655
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i am not sure how to do this, and i really need to get this class over with
Effect of Price on Supply of Eggs Suppose the wholesale price of a certain brand of medium-sized eggs p (in dollars/carton) is related to the weekly supply x (in thousands of cartons) by the following equation. 625p2 − x2 =100
If 37000 cartons of eggs are available at the beginning of a certain week and the price is falling at the rate of 7¢/carton/week, at what rate is the supply changing? (Round your answer to the nearest whole number. ) (Hint: To find the value of p when x = 37, solve the supply equation for p when x = 37. )
The supply of average eggs is decreasing at a rate of approximately -550 cartons per week as the price decreases 7 cents per carton per week.
The equation given states that the weekly supply x (in thousands of cartons) of a certain brand of medium-sized eggs is related to the wholesale price p (in dollars/carton) by the following equation: 625p2 − x2 =100. In order to determine the rate at which the supply is changing, we must first calculate the value of p when x = 37,000, which is the number of cartons available at the beginning of the week. To do this, we can solve the equation for p when x = 37,000[tex]p = (100 + x2)1/2/625[/tex]. When x=37,000, p=3.65. Therefore, if the price is falling at the rate of 7¢/carton/week, then the new price p = 3.65 - 0.07 = 3.58. When we plug this new value of p into the supply equation, we get[tex]x^2[/tex] = 4,225. Taking the square root of both sides gives us x = 65. Therefore, the supply is decreasing at a rate of approximately -550 cartons per week as the price decreases 7 cents per carton per week.
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Identify the aspects of this exponential function: y = 350(1 + 0. 75)t
Answer:
Step-by-step explanation:
The initial value, a, is 350, and the growth rate, b, is 1.75 so this is an exponential growth function.
Jacob is planting flowers for his grandmother. This morning, he spent an hour planting annuals and an hour planting perennials, but he planted more annuals than perennials. This afternoon, he has the same number of annuals and perennials left to plant. Which will likely take him more time to plant?
It is likely that it will take Jacob more time to plant the perennials than the annuals.
What is time?Time is an abstract concept that is not tangible and cannot be seen, touched, or heard. It is a measure of the passage of events and is used to set and track schedules, create goals, and even measure the lifespan of an individual. Time is a precious commodity that cannot be replaced or taken back. Once it has passed, it is gone forever. Time is also a powerful force that can bring us joy and sorrow, success and failure. It is a constant reminder of how quickly our lives can change and how important it is to make the most of every moment.
Perennials require more attention when planting because they have a longer lifespan and are meant to come back year after year. Annuals, on the other hand, only last for one season. Therefore, they require less attention when planting. Jacob will need to make sure that he carefully places the perennials in the soil, as well as taking care to not damage the roots. He may also need to take extra time to trim any overgrowth from the plants. This extra care and attention will likely take more time than it would to plant the annuals.
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A rectangular prism has a height of 1 inch, a width of of an inch, and a 2 1volume of of a cubic inch. What is the length, in inches, of this prism?
The length of the rectangular prism is 1 inch.
The volume of a rectangular prism can be calculated using the formula V = lwh, where l is the length, w is the width, and h is the height. In this case, the volume of the prism is given as 1 cubic inch and the width and height are given as 1 inch and 1 inch, respectively. To solve for the length of the prism, we can rearrange the equation to l = V/wh. Plugging in our given values, we can calculate the length of the prism as l = 1/1 x 1 = 1 inch. Thus, the length of the rectangular prism is 1 inch.Therefore, the length of the rectangular prism is 1 inch.
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Please help this is Grade 8 nobody answered it so i am putting it up i will give brainlist you need to solve part 2 the 2 with the circle is all i got
Answer: 12=7
Step-by-step explanation: add one side ten add the other
Yes, this is a solution because the point(s) at which all the lines intersect are the solutions to the system.
Fully factor the following polynomials. Explain your thought process with your solution.
a. ????(x) = 2x3 − 25x2 + 53x − 30 [3 marks]
b. ????(x) = x3 + 3x − 4 [3 marks]
a. the factors of equation is [tex]f(x)=(x-1)(x-10)(2x-3)[/tex]
b. the factors of equation is [tex]f(x)=(x-1)(x^2+x+4)[/tex]
Define the term polynomial?A polynomial is an expression consisting of variables and coefficients that involves only the operations of addition, subtraction, and multiplication, with non-negative integer exponents.
a. Given function,
[tex]f(x)=2x^3 -25x^2 + 53x - 30[/tex]
By using trial and error method, put values of x =1, x= 10, and x= 3/2 are satisfied values for above function,
[tex]f(x)=(x-1)(x-10)(2x-3)[/tex]
therefore, the factors of equation is (x-1) (x-10) (2x-3)
b. Given function,
[tex]f(x)=x^3 +3x - 4[/tex]
Similarly using trial and error method,
[tex]f(x)=(x-1)(x^2+x+4)[/tex]
therefore, the factors of equation is (x-1) (x² + x + 4)
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Factor of given polynomials are a. (x-1)(x-10)(2x-3), b. (x-1)(x² + x + 4) .
Describe polynomials ?In mathematics, a polynomial is an expression that consists of variables and coefficients, combined using the operations of addition, subtraction, and multiplication, but not division by a variable. The variables in a polynomial can only have non-negative integer exponents.
Polynomials can have different degrees, which is the highest power of the variable in the expression. For example, the polynomial 3x² - 5x + 2 is a quadratic polynomial, since its highest power of x is 2. If the degree of a polynomial is n, then it has at most n roots, which are the values of x that make the polynomial equal to zero.
Polynomials are used in many areas of mathematics and science, including algebra, calculus, physics, and engineering. They are used to model and analyze many different types of phenomena, such as motion, population growth, and electrical circuits.
Polynomials can also be added, subtracted, and multiplied together to form new polynomials. Additionally, polynomials can be factored, which involves breaking them down into simpler polynomials that multiply together to give the original polynomial.
a) f(x)= 2x³ - 25x² + 53x - 30
⇒(x-1)(x-10)(2x-3)
b) f(x)= x³ + 3x - 4
⇒(x-1)(x² + x + 4)
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The complete question is:
Question Solve: -(5)/(2x)-1=(1)/(6x). Complete Sorry, that's incorrect. Try again? x=(7)/(3)
x = 7/3.
To solve this equation, you need to first simplify the left side of the equation. The left side of the equation can be simplified to -3/(2x). Then, you can set the two expressions equal to each other and solve for x.
-(3)/(2x) = (1)/(6x)
-(6x)/(2x) = (1)/(6x)
-3 = 1
-2 = 1
Therefore, x = 7/3.
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determine the intercepts.
do not round answers
Answer: X-intercept: (38/7, 0)
Y intercept: (0, -38)
Step-by-step explanation:
To find X-intercept(s), substitute in 0 for y and solve for x
(0)−4=7(x−6) Solve the equation
rewrite the equation as: 7 (x-6) = (0) -4
subtract 4 from 0: 7 (x-6) = -4
Divide each term in 7 (x-6) = -4 by 7 and simplify
x-6= -4/7
Move all terms not containing x to the right side of the equation.
x= 38/7
X-intercept(s) in point form.
X-intercept(s): (38/7,0)
Sry cant upload a photo to save my life (for y-intercept(s):)
The pressure exerted on a table by a brick is 180 N/m² and the area of the base of the brick is 0.03 m². Calculate the force, in N, that the brick exerts on the table. If your answer is a decimal, give it to 1 d.p.
Step-by-step explanation:
We can use the formula for pressure:
pressure = force/area
We know the pressure and the area, so we can rearrange the formula to solve for the force:
force = pressure x area
Plugging in the values, we get:
force = 180 N/m² x 0.03 m² = 5.4 N
Therefore, the force that the brick exerts on the table is 5.4 N
The local fire department has been called to an apartment fire in downtown Atlanta. They need to rescue a family that is on the 3rd floor and want to make sure they brought the correct ladder to perform the rescue. The height they need to reach is 30 feet and they know that they must at least be 20 feet from the bottom of the building to clear the awning. If the fire department brought a 35 foot ladder, Can they save the family
If the fire department brought a 35-foot ladder, Can they save the family: = √(325) feet. And They can't save family because √400 > √325
Given that :- height - 30 feet , ladder - 35 feet
[tex]AC^2 = AB^2+ BC^2[/tex]
BC = √([tex]AC^2-AB^2[/tex])
= √([tex]35^2 -30^2[/tex])
= √( 1225 - 900)
= √(325) feet
but the fire department must be so face from the bream of the building
20 = √[tex](20)^2[/tex]
= √400 > √325
They can't save family because √400 > √325
Pythagorean theorem, the notable mathematical theorem that the amount of squares on the legs of a right triangle is equivalent to the square on the hypotenuse (the side inverse the right point) — or, in recognizable logarithmic documentation, a2 + b2 = c2.
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What must the values of a and b be for pqrs to be a parallelogram?
Answer:
the a give the x value twords the b and adds up the equation
Find the square root of the difference between the square of thirteen and the square of twelve
The square root of the difference between the square of thirteen and the square of twelve by first calculating the squares of 13 and 12 is 5.
First, we need to find the square root of thirteen and the square of twelve. The square of a number is the number multiplied by itself. So, [tex]$13^2$[/tex] means [tex]$13$[/tex] multiplied by itself and [tex]$12^2$[/tex] means [tex]$12$[/tex] multiplied by itself.
[tex]$13^2[/tex] = 13 \times 13 = 169
[tex]$12^2[/tex] = 12 \times 12 = 144
Next, we need to find the difference between the square of thirteen and the square of twelve by subtracting the smaller number from the larger one.
169 - 144 = 25
Finally, we take the square root of the difference to find the solution. The square root of a number is the value that, when multiplied by itself, gives the original number.
[tex]\sqrt{25} = 5[/tex]
Therefore, the square root of the difference between the square of thirteen and the square of twelve is 5.
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Plsss helppppp i need thisss rnnnn
Answer:
a = 21, b = 70, c = 89
Step-by-step explanation:
opposite angles of intersecting lines are the same, 21 = 21
adjacent angles of intersecting lines add up to 180, 180 - 110 = 70
angles of a triangle add up to 180, 180 - 70 - 21 = 89
Answer:
a = 21, b = 70, c = 89
Step-by-step explanation:
Pleaseee help me!!
A freight train from Boston to New York and a passenger train from New York to Boston both depart at 3:00 p. M. The speed of the freight train is 80 miles per hour, and the speed of the passenger train is 60 miles per hour. The New York station and the Boston station are 280 miles apart. At what time will the trains pass each other?
The New York station and the Boston station are 280 miles apart. The trains will pass each other 2 hours after 3:00 pm, which is at 5:00 pm.
What is distance?Distance is the separation between two points or things. It has magnitude but no direction because it is a scalar quantity. Typically, it is measured in terms of distances like metres, kilometres, feet, and miles.
According to question:Let's assume that the trains meet at time t hours after 3:00 pm. In this time, the freight train will travel a distance of 80t miles, and the passenger train will travel a distance of 60t miles. The total distance covered by both trains will be the sum of these distances, which is 80t + 60t = 140t miles.
We know that the total distance between the two stations is 280 miles. Therefore, we can write an equation based on the distance covered by both trains:
80t + 60t = 280
Simplifying this equation, we get:
140t = 280
Dividing both sides by 140, we get:
t = 2
This means that the trains will pass each other 2 hours after 3:00 pm, which is at 5:00 pm.
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Please help me thanks
Answer:
its 240
Step-by-step explanation: 10 x 8 x 3 = 240 :)
Answer:
a) Volume= length x width x height v=l x w x h
b) 240 cm^3 (cm cubed)
Step-by-step explanation:
Substitute into this formula
v=l x w x h
10 x 8 x 3 = 240
So 240 cm^3 (cm cubed)
Important note: Remember to include units, as they may not be given to you in the exam
I NEED HELP ON THIS ASAP!!
The count of TV to be sold to give the maximum profit are 24 and 48, respectively
How many of each TV to be sold to give the maximum profitThe objective function is given as
P(n, m) = 175b + 205m
The constraints, and their evaluated values are given as
P(0, 0) =175(0) + 205(0) = 0
P(0, 64) =175(0) + 205(64) =13,120
P(24, 48) =175(24) + 205(48) =14,040
P(72, 0) =175(72) + 205(0) = 12,600
From the above computations, we have the maximum value to be
Maximum = 14040
These values are at
b = 24 and m = 48
Hence, the number of TV to be sold are 24 and 48, respectively
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The membership fee at a sports club was $700 per year. Each year, the membership fee increased by 6%. Write the equation to find out how many years will it take for the cost of the membership to be $900? Do not solve.
[tex]\qquad \textit{Amount for Exponential Growth} \\\\ A=P(1 + r)^t\qquad \begin{cases} A=\textit{accumulated amount}\dotfill & \$ 900\\ P=\textit{initial amount}\dotfill &700\\ r=rate\to 6\%\to \frac{6}{100}\dotfill &0.06\\ t=years\\\ \end{cases} \\\\\\ 900 = 700(1 + 0.06)^{t} \implies 900=700(1.06)^t[/tex]
You are solving this system of equations by eliminating y first. Which of the following options below
shows the correctly multiplied pair of equations?
12x + 6y = 10
2x + 3y = 8
a. 12x+6y=10
-12x + (-36y) = -48
b. 12x+6y= 10
-12x + (-18y) = -48
c. 12x+6y= 10
-24x + (-6y) = -16
d. 12x+6y=10
y
-4x + (-6y) = -16
Option D. 12x + 6y = 10, -4x - 6y = -16. To eliminate y from the system of equations, we need to multiply one or both equations by a constant so that the coefficients of y have opposite signs.
Then we can add or subtract the equations to eliminate y.
We can do this by multiplying one or both equations by a constant that will make the coefficients of y add to zero. The goal is to create additive inverses of the coefficients of y in the two equations.
Looking at the two equations:
12x + 6y = 10
2x + 3y = 8
We can see that the coefficients of y are 6 and 3. To eliminate y, we need to find a common multiple of 6 and 3 that will make the coefficients of y additive inverses of each other. The least common multiple of 6 and 3 is 6, so we can multiply the second equation by -2 to get:
-4x - 6y = -16
Now we can add this equation to the first equation to eliminate y:
12x + 6y = 10
(-4x - 6y = -16)
8x = -6
Therefore, the correct pair of equations after multiplying to eliminate y is:
12x + 6y = 10
-4x - 6y = -16
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I dont know how to do this
pls answer if u know with simple working
i dont know if u add 4 each time it didnt work for last questionn
The 3rd term of the linear sequence is 14
What is a linear sequence?A linear sequence is a sequence of numbers which each successive term increases or decreases by a given value.
Given the linear sequence 22, 18, 14, 10, 6,... We want to find the 3rd term
The general term of a linear sequence is Uₙ = a + (n - 1)d where
a = first term and d = common differenceIn the linear sequence above a = 22. We notice that the second term is U₂ = 18
= a + d
Now d = U₂ - a
= 18 - 22
= -4
Now for the third term, n = 3
So, U₃ = a + (n - 1)d
= a + (3 - 1)d
= a + 2d
Substituting the values of the variables into the equation, we have that
U₃ = a + 2d
= 22 + 2 × (-4)
= 22 - 8
= 14
So, the 3rd term is 14
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ITS THE LAST DAY OF THE SEMSTER PLS HELP I AM GONNA FAILLLLLLLL!!!! PLEASE ANYONE HELP!!!!
Answer:
Step-by-step explanation:
I think to get the height is length x width
for distance you need to so SOH CAH TOA
Yogurtland charges $2.40 for 8 ounces of frozen yogurt. At this price, how frozen yogurt can you buy with a $15 gift card?
Answer:
Answer and Explanation below
Step-by-step explanation:
You can get 50 ounces of yogurt with a $15 gift card
Divide 15 by 2.40 ounces should equal 6.25 then multiply by 8 because those are the starting ounces answer is 50
Unit 2: Logic & Proof
Homework 2: Compound Statements
on using disjunctive syllogism to derive Q from the second premise and the derived value of A. if P is true, then Q must also be true..
In logic, a compound statement is made up of two or more simple statements, known as premises or assumptions, that are combined using logical operators such as "and," "or," and "not." To prove a compound statement, we use rules of inference to derive a conclusion based on the given premises.
In the first proof question, we are given three premises: P, P or R, and not S or A. We need to prove the statement Q using these premises. To do so, we use the disjunctive syllogism rule, which states that if one of two disjunctive statements is false, then the other must be true. By assuming ~P, we derive ~S from the third premise using the rule of disjunction. Then, using modus ponens, we derive A from the assumption of ~P and the third premise. Finally, we use disjunctive syllogism to derive Q from the second premise and the derived value of A.
In the second proof question, we are given three premises: not P or S, not S, and R or Q. We need to prove the statement P implies Q using a conditional world proof. We assume P is true and derive S using the first premise. Using the second premise and modus tollens, we derive not R. Finally, using disjunctive syllogism, we derive Q from the third premise and the derived value of not R. Therefore, we show that if P is true, then Q must also be true..
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Two numbers are in the ratio of 7 : 4 and their difference is 33. Find the numbers.
Please do it step by step.
geometric relationships
Geometric relationships refer to the ways in which different geometric figures or objects are related to each other. These relationships can include measures of angles,lengths of sides or edges, areas, volumes, and other properties.
Some common geometric relationships include:
Parallel lines: Two lines in a plane are parallel if they never meet, no matter how far they are extended.Perpendicular lines: Two lines in a plane are perpendicular if they intersect at a right angle (90 degrees).Congruence: Two geometric figures are congruent if they have the same size and shape. Congruent figures can be moved or rotated to overlap each other exactly.Similarity: Two geometric figures are similar if they have the same shape but can be different sizes. Similar figures have corresponding angles that are equal and corresponding sides that are in proportion.Pythagorean theorem: In a right triangle, the square of the length of the hypotenuse (the side opposite the right angle) is equal to the sum of the squares of the lengths of the other two sides.Area formulas: The area of a rectangle is equal to the product of its length and width. The area of a triangle is equal to half the product of its base and height. The area of a circle is equal to pi times the square of its radius.Volume formulas: The volume of a rectangular prism is equal to the product of its length, width, and height. The volume of a cylinder is equal to pi times the square of its radius times its height.These are just a few examples of the many geometric relationships that can be studied in mathematics. Understanding these relationships can help us solve problems, make predictions, and create new designs or structures.
aunt polly asked tom to paint the entire length of a fence,but he only painted 8 yards and then ran away to play. Sid had to finish the job for to. Sid started at noon and by 12:30 p.m.,14 yards were painted including what tom had painted.By 2:00 p.m., 32 yards were painted,and by 2:30 p.m., 38 yards were painted.Let t be the number of minutes that have passed since sid started painting at noon,but not past 4:30 p.m. Write an equation that shows the relation ship between t and p where p is the number of yards of painted fence.
The equation that shows the relation ship between t and p is 0 ≤ t < 270.
What is the Linear equations?A linear equation is an algebraic equation where the highest power of the variable is 1, and the equation represents a straight line when graphed.
Break down the information given in the problem to form an equation that relates the time t and the number of yards of painted fence p:
Tom painted 8 yards before running away, so Sid had to paint the remaining length of the fence, which is L - 8 yards, where L is the total length of the fence.
From noon to 12:30 p.m., Sid painted 14 - 8 = 6 yards.
From 12:30 p.m. to 2:00 p.m., Sid painted 32 - 14 = 18 yards.
From 2:00 p.m. to 2:30 p.m., Sid painted 38 - 32 = 6 yards.
We want to find an equation that relates the time t (in minutes) to the number of yards of painted fence p.
Based on the information above, we can create a piecewise equation that relates t and p:
p = { 8 + 0.2t, 0 ≤ t < 30
14 + 0.6(t - 30), 30 ≤ t < 90
32 + 0.4(t - 90), 90 ≤ t < 150
38 + 0.2(t - 150), 150 ≤ t < 210 }
Explanation of the equation:
The first segment of the piecewise equation, 8 + 0.2t, represents the yards of fence painted by Tom (8) plus the yards painted by Sid in the first 30 minutes (0.2t), where 0 ≤ t < 30.
The second segment, 14 + 0.6 (t - 30), represents the additional yards painted by Sid between 12:30 p.m. and 2:00 p.m., where 30 ≤ t < 90. The expression (t - 30) represents the time elapsed since 12:30 p.m., and the coefficient 0.6 represents the rate at which Sid is painting the fence in yards per minute during this period.
The third segment, 32 + 0.4 (t - 90), represents the additional yards painted by Sid between 2:00 p.m. and 2:30 p.m., where 90 ≤ t < 150. The expression (t - 90) represents the time elapsed since 2:00 p.m., and the coefficient 0.4 represents the rate at which Sid is painting the fence in yards per minute during this period.
The fourth segment, 38 + 0.2 (t - 150), represents the additional yards painted by Sid between 2:30 p.m. and 4:30 p.m., where 150 ≤ t < 210. The expression (t - 150) represents the time elapsed since 2:30 p.m., and the coefficient 0.2 represents the rate at which Sid is painting the fence in yards per minute during this period.
Note that we have limited the time t to be between noon and 4:30 p.m., which corresponds to 0 ≤ t < 270.
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the coefficient of friction as the function of temperature is being done experimentally and given by the following equation :
μ(T)=0.0068e^(-)T-37.03)^2/(-19.77)^2 + 0.1338
According to Logger Pro after proccessing the data, the RMSE or root mean square error value is 0.000711079.
What could we interpret from the value of RMSE?
Can predict the friction coefficient as a function of temperature with high accuracy.
We can interpret the following from the value of RMSE:The value of RMSE is a metric used to measure the accuracy of the predicted and observed data. A lower value of RMSE indicates that the experimental data is in agreement with the theoretical model used, while a higher value of RMSE indicates that the experimental data does not agree with the theoretical model used.The RMSE value of 0.000711079 in the experiment implies that the experimental results are in good agreement with the model, and the model used can predict the friction coefficient as a function of temperature with high accuracy.
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