The customer purchased 14 face masks and 8 hand sanitizers.
What is a linear system of equations?A system of linear equations consists of two or more equations made up of two or more variables such that all equations in the system are considered simultaneously. The solution to a system of linear equations in two variables is any ordered pair that satisfies each equation independently.
Given that, Maleri Designs sells cartons of cloth face masks ($12) and cartons of hand-sanitizer ($6) on eBay.
Let the number of face masks be f an the number of hand-sanitizers be h.
One of their customers, Mod World, purchased 22 cartons for $216.
Now, f+h=22 --------(I) and
12f+6h=216 --------(II)
f=22-h
Substitute f=22-h in equation (II), we get
12(22-h)+6h=216
264-12h+6h=216
264-216=6h
6h=48
h=8
Substitute h=8 in equation (I), we get
f+8=22
f=14
Hence, the customer purchased 14 face masks and 8 hand sanitizers.
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Need help with question (3)
Answer:
The statement "The series converges by the Integral Test" is true. The Integral Test is a method used to determine the convergence or divergence of a series. The test states that if the series is of the form:
∑(f(n))
where f(n) is a positive and continuous function defined for n ≥ 1 and is decreasing for n ≥ 1, then if the integral of f(n) from 1 to infinity converges, the series also converges. If the integral diverges, the series diverges.
It is important to note that the Integral Test is only one method of determining the convergence or divergence of a series and that it has some limitations such as it only works when the function f(n) is positive and decreasing. Also, the test is only inconclusive if the necessary conditions are not met, so statement 4 and 5 are not true.
Answer:
Step-by-step explanation:You should notice because you're in the class you should notice because the teachers are obviously teaching this because they wouldn't just give you something that they didn't cheat so if you sleep in class or like not paying attention speak into a friend or like something like doing something in my pay attention you ain't getting no you ain't getting nothing.
The championship record for a baseball team in a certain year was 52 games won and 14 games lost. What is the win percentage?
The win percentage is 79%
How to find the percentage?Suppose the value of which a thing is expressed in percentage is "a'
Suppose the percent that considered thing is of "a" is b%
Then since percent shows per 100 (since cent means 100), thus we will first divide the whole part in 100 parts and then we multiply it with b so that we collect b items per 100 items(that is exactly what b per cent means).
Thus, that thing in number is
[tex]\dfrac{a}{100} \times b[/tex]
Given;
Number of games won=52
Number of games lost=14
Now, total games played= 14+52=66
Percentage of games won;
=(games won/total games)x100
= 52x100/66
=78.78
Therefore, the win percent will be 79%
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You are getting paid 50$ per hour and at the end of the day, you earned 400$. How many hours did you have to work to earn that kind of money?
You worked for 8 hours.
What is unit rate?A unit rate means a rate for one of something. We write this as a ratio with a denominator of one. For example, if you ran 70 yards in 10 seconds, you ran on average 7 yards in 1 second. Both of the ratios, 70 yards in 10 seconds and 7 yards in 1 second, are rates, but the 7 yards in 1 second is a unit rate.
Given that, You are getting paid $50 per hour and at the end of the day, you earned $400.
Unit rate for working an hour = $50
We will calculate the number of hours of work by dividing total earning by its unit rates.
= 400 / 50
= 8
Hence, You worked for 8 hours.
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Equivalent expression
The equivalent expression of the given expression is {4/y - 56}.
What are algebraic expressions?In mathematics, an expression or mathematical expression is a finite combination of symbols that is well-formed according to rules that depend on the context.Mathematical symbols can designate numbers (constants), variables, operations, functions, brackets, punctuation, and grouping to help determine order of operations and other aspects of logical syntax.Given is the expression as -
8(1/2y - 7)
The given expression is -
8(1/2y - 7)
(8 x 1/2y - 8 x 7)
4/y - 56
Therefore, the equivalent expression of the given expression is {4/y - 56}.
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{Complete question is
Write an equivalent expression for 8(1/2y - 7)}
The reciprocal of 10 1-2
The reciprocal of that fraction is 2/21.
What is Reciprocal?The inverse of a value or a number is how reciprocal is commonly used in mathematics. The reciprocal of n will be 1/n if n is a real number. In other words, we must change the number to be inverted. One divided by nine, or 1/9, is the reciprocal of nine, for instance. A value of one is produced when we multiply a number by its reciprocal. The term multiplicative inverse is another name for it.
reciprocal is simply defined as the inverse of a value or a number. If n is a real number, then its reciprocal will be 1/n. It means that we have to convert the number to the upside-down form.
Using the given functions to set up and simplify 1-2
10=1-2=-1
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Given that z is a standard normal random variable, compute the following probabilities (to 4 decimals).
P(z ? -1.0)
P(z ? -1.0)
P(z ? -1.5)
P(z ? -2.5)
P(-3 < z ? 0)
Computed the probabilities P(z < -1.0)=0.1587, P(z > -1.0)=0.8413, P(z < -1.5)=0.0668, P(z < -2.5)=0.0062, P(-3 < z < 0)=0.4987.
What is deviation ?
Deviation refers to how far a value or set of values is from the mean or average. In statistics, the standard deviation is a measure of the spread of a dataset, calculated as the square root of the variance. It represents the average distance of each data point from the mean. A low standard deviation indicates that the data points tend to be close to the mean.
To compute the probabilities for a standard normal random variable, we can use a standard normal table or a calculator with standard normal distribution functions.
P(z ? -1.0) = P(z < -1.0) = 0.1587
P(z ? -1.0) = P(z > -1.0) = 1 - 0.1587 = 0.8413
P(z ? -1.5) = P(z < -1.5) = 0.0668
P(z ? -2.5) = P(z < -2.5) = 0.0062
P(-3 < z ? 0) = P(-3 < z < 0) = P(z < 0) - P(z < -3) = 0.5 - 0.0013 = 0.4987,
Computed the probabilities P(z < -1.0)=0.1587, P(z > -1.0)=0.8413, P(z < -1.5)=0.0668, P(z < -2.5)=0.0062, P(-3 < z < 0)=0.4987.
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A summer camp has 550
campers who will be going on an outing. Estimate the number of vans needed to accommodate the entire camp if each van can comfortably hold 11
passengers. Then calculate the actual number of vans that will be needed.
Answer: 50
Step-by-step explanation:
1 van = 11 campers
Number of vans that will be needed = 550/11
=50
The question is in the photo
From given pie chart, The percentage of students for 12th grade is 20%.
What is a pie chart?
The “pie chart” is also known as a “circle chart”, dividing the circular statistical graphic into sectors or sections to illustrate the numerical problems. Each sector denotes a proportionate part of the whole. A pie chart requires a list of categorical variables and numerical variables. To find out the composition of something, Pie-chart works the best at that time. In most cases, pie charts replace other graphs like the bar graph, line plots, histograms, etc.
The total value of the pie is always 100%.
Now
As
The total value of the pie is always 100%.
12th+9th+10th+11th=100
12th+30+27+23=100
12th=100-80
12th=20%
Hence,
The percentage of students for 12th grade is 20%
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To find the least number that is divisible by 2, 3, 4, 6, and 8, which are the only two factors that you need to use? Explain
Answer:
6, 8
Step-by-step explanation:
2 and 3 are factors of 6. So, if number is divisible by 6, then the same number is divisible by 2 and 3.
Eg: 12 is divisible by 6. So, 2 and 3 will divide 12.
4 and 2 are factors of 8. if number is divisible by 8, then the same number is divisible by 4 and 2.
Eg: 48 is divisible by 8. So, 4 and 2 will divide 48.
So, to find the least number that is divisible by 2, 3, 4, 6 and 8, then the only two factors that we need to use are 6 and 8.
Rewrite in simplest rational exponent form (square root of x times the fourth root of x). Show each step of your process.
In the simplest rational exponent form of "square root of x times the fourth root of x" is [tex]x^{1/6}[/tex].
What is exponent?Exponentiation is one of the mathematics operation.
Let mᵃ, where m and a are the real numbers.
And m is multiplied by a time to itself.
So, a is the exponent of m.
Given:
We have a phrase:
Square root of x times the fourth root of x.
In numerator form:
(√x)[tex]\sqrt[1/4]{x}[/tex]
Simplifying,
(√x)[tex]\sqrt[1/4]{x}[/tex],
= [tex]x^{1/2} x^{1/4}[/tex]
= [tex]x^{1/2+1/4}[/tex]
= [tex]x^{1/6}[/tex]
Therefore, [tex]x^{1/6}[/tex]the required simple rational form.
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the accompanying major league baseball data provide data for one season. use the data to build a multiple regression model that predicts the number of wins. complete parts a through c.
Considering the data we have been provided, we can build a multiple regression model as follows.
a.) In MS Excel, we enter the data set and utilize the "Correlation" option under Data > Data Analysis to create the correlation matrix and answer the question. The correlation matrix may be seen below.
[Fig. 1]
Correlation coefficients for at least one of the independent variables are larger than 0.7.
b.) We must look at the column labeled "Won" in the correlation matrix. The variables are Runs, Hits, Earned Run Average (ERA) and Walks if the criteria are 0.4.
c.) In MS Excel, we enter the data set and utilize the "Regression" option under Data > Data Analysis to create the regression model and answer the question. The result is shown below.
[Fig. 2,3,4]
Runs, ERA, and SO are all significant, with p-values less than 0.05. As a result, we recreate the regression model with these three independent variables.
[Fig. 5,6,7]
The right answer is Won = 80.321 + (0.101) X1 + (-14.276) X3 + (-0.011) X4.
The R2 value of the model is 0.948. This suggests that these factors can predict 94.8% of the number of victories. This model does not make use of the same variables as the previous one (b).
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by selecting the filled-in regions on the graph, you can determine that the area of the canvas covered by the barn door is equal to 15 square inches.By selecting the filled-in regions on the graph, you can determine that the area of the canvas covered by the road is equal to [ ] square inches.
Area of the road 4 (in both selected sides)
Which of the following statements are true regrading areas?
-Each palette icon will always allow you to drag only one fill area onto the graph.
-Areas can be used to shade a region of any shade.
-Changing the position of the other objects on the graph may change the shape of the possible regions you may fill.
The statements that are true regarding the areas are that each palette icon will always allow you to drag only one fill area onto the graph. Changing the position of the other objects on the graph may change the shape of the possible regions you may fill.
The statement "Each palette icon will always allow you to drag only one fill area onto the graph." is true.
The statement "Areas can be used to shade a region of any shade." is false. Areas can be used to shade a region in a specific colour or pattern, but not necessarily any shade.
The statement "Changing the position of the other objects on the graph may change the shape of the possible regions you may fill." is true.
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Here is the graph of a sequence:
1. Is this sequence arithmetic or geometric?
Explain how you know.
2. List at least the first five terms of the
sequence.
3. Write a recursive definition of the sequence.
A graph is a visual representation of data or information using points, lines, or bars.
How to plot the Graph?
To plot a graph, you need to have a set of x and y values that correspond to points on the graph. Once you have the data, you can use a tool such as a graphing calculator, spreadsheet software or specialized graphing software to plot the points and create the graph.
This sequence appears to be a geometric sequence. In a geometric sequence, the ratio between any two consecutive terms is always the same. In this case, the ratio between consecutive terms decreases by a factor of 1/4 each time.
The first five terms of the sequence are: (64,1), (16,2), (4,3), (2,4), (0,5)
A recursive definition of the sequence is a definition that expresses each term of the sequence in terms of one or more of the previous terms.
This definition says that each term of the sequence is the previous term divided by 4.
It's important to note that the graph you provided does not have a clear representation of the sequence, the points (64,1) (16,2) (4,3) (2,4) (0,5) does not represent a sequence as the x-coordinate does not represent the nth term of the sequence. The graph does not provide enough information to determine if it's arithmetic or geometric, or to list the first five terms of the sequence, or to write a recursive definition of the sequence.
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The perimeter of a rectangular field is 52 yards. The length is 4 more yards than the width. Find the length and width of the field.
The the length and width of the rectangular field are respectively; 15 yards and 11 yards
How to find the perimeter of a rectangle?The perimeter of a rectangle is given by the formula;
Perimeter = 2(Length + width)
We are given;
Perimeter = 52 yards
Length(L) = W + 4
Width = W
Thus;
2(W + W + 4) = 52
2W + 4 = 52/2
2W + 4 = 26
2W = 22
W = 11 yards
L = 11 + 4
L = 15 yards
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Alexis is working with her English classes to make sure they are
all able to pass the upcoming state exam. From last year's data,
she predicts the number of students that will not pass the exam
is modeled by the linear equation:
y=-2.5t + 60,
where t is the number of weeks her students have been taking
the class.
The number of students from given linear equation after 6 weeks will be 45.
What is a linear equation ?
A linear equation is an equation in which the highest power of the variable is always 1. It is also known as a one-degree equation. The standard form of a linear equation in one variable is of the form
Ax + B = 0
e.g. x-10=0. Here, x is a variable, A is a coefficient and B is constant.
The standard form of a linear equation in two variables is of the form
Ax + By = C
e.g. 2x-4y=10. Here, x and y are variables, A and B are coefficients and C is a constant.
Now,
As given linear equation for students is
y=-2.5t + 60
where where t is the number of weeks her students have been taking
the class and y = no. of students.
To find students after 6 weeks put y=6
Therefore, y=-2.5*6+60
y=45
Hence,
The number of students from given linear equation after 6 weeks will be 45.
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Right question:-
Alexis is working with her English classes to make sure they are
all able to pass the upcoming state exam. From last year's data,
she predicts the number of students that will not pass the exam
is modeled by the linear equation:
y=-2.5t + 60,
where t is the number of weeks her students have been taking
the class and y = no. of students.
Find mo. of students after 6 weeks.
Alessandra is having a dinner party she calculates that each meal will cost 13.00$ a person she has an 85 dollar budget for her party which inequality represents the number of people she can invite without going over her 85$ budget
She can only invite a total of six individuals, and the inequality that best captures the circumstance is 13x ≤ 85.
What is inequality?In mathematics, inequalities specify the connection between two non-equal numbers. Equal does not imply inequality. Typically, we use the "not equal sign ()" to indicate that two values are not equal. But several inequalities are utilized to compare the numbers, whether it is less than or higher than.
Given, Alessandra is having a dinner party she calculates that each meal will cost 13.00$ a person she has an 85 dollar budget
Let "x" be the number of people she can invite to the party
Thus,
The total cost required for the party = 13x
Since her budget is $85.
Maximum people she can invite:
13x ≤ 85
x ≤ 85/13
x ≤ 6.53
therefore, she can maximum invite 6 people and the inequality that represents the given situation is 13x ≤ 85.
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If two lines are parallel, then
corresponding angles are congruent.
Choose the equivalent statement.
A. If two lines are parallel, then the corresponding angles are not
congruent.
B. If two lines are not parallel, then corresponding angles are
congruent.
C. If corresponding angles are not congruent, then the lines are not
parallel.
Answer:
C
Step-by-step explanation:
If two lines are parallel, then corresponding angles are congruent.
OR
If two lines are NOT parallel, then corresponding angles are NOT congruent.
So compare these 2 to the answers. Only C is right.
◄) Convert:
5 gal 13 c =с
13 c is equal to 48.775 L.
What is equality?Equality in math is a concept that states that two expressions, equations, or values are equal to each other. Equality is symbolized by the equals sign “=.” Equality is a fundamental law of mathematics, and it is used in a variety of contexts and equations. Equality can be used to compare two different objects, or to set a value for a single object. Equality can also be used to determine if two equations are equivalent. Equality is an important concept in mathematics, as it allows us to find solutions to difficult problems.
5 gallons (gal) is equal to 18.925 liters (L). Therefore, 13 c is equal to 48.775 L.
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If f(x) = 2+1, what is the value of f-¹ (3)?
OA. 끅
OB.
O c. /
OD. 13
E. 11
Answer:
e
Step-by-step explanation:
Compare Slopes: Are these lines parallel, perpendicular, or neither?
Y = 3x - 5
Y = 3x + 6
Answer:
parallel
Brief explanation:
Well parallel lines have the same slopes sooo
these two lines are parallel
hence the answer
study hard
PLEASE HELP There is a picture if you click on it haha
Answer:
120y + 720x = 600 (First option)Step-by-step explanation:
Correct answers only explained
------------------------------------------------------------------
We have the original equation as
72x + 12y = 60
If we multiply by 10 we get
720x + 120y = 600
First option
---------------------------------------------------------------
We can rewrite the original equation 72x + 12y = 60 as follows
Carry 72x to the right:
12y = 60 - 72x
Divide by 12
y = 5 - 6x
Second option
---------------------------------------------------------------
Rewrite 72x + 12y = 60 as
12y + 72x = 60 (same thing)
Divide by 6:
2y + 12x = 10
Third option
---------------------------------------------------------------
Rewrite 72x + 12y = 60 as
72x = 60 - 12y
Divide by 72
x = 60/72 -12y/72
Reduce to lowest fraction
x = 5/6 - y/6
Fifth option
------------------------------------------------
state the minimum or maxium value of y=2x^2
Since dy/dx > 0 for x = -7 and dy/dx < 0 for x = -9 , So this is a turning point.
What is Algebraic expression ?
Algebraic expression can be defined as the combination of variables and
constants.
So, the given expression ,
y = 2x^2 + 32x -4
So, first we have to find the derivative dy/dx
and than solve for dy/dx = 0
The derivative of any term x^n is equals to n*x^n-1 so for this polynomial
2x^2 + 32x - 4
The derivative could be
2.2x+1.32+0.-4
dy/dx = 4x+32
To calculate the turning points
let this equals to 0.
4x+32 = 0
x = -32/4
x = -5
By substituting this into the original equation, the turning point is at (-8,-137).
Therefore, Since dy/dx > 0 for x = -7 and dy/dx < 0 for x = -9 , So this is a turning point.
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Helio in Jersey live down the street from each other 1500 m apart they leave their homes at the same time walking towards each other Julia travels at a rate of 2000 m an hour and Josie travels at a rate of 4000 m an hour how far they apart after they walk for 15 minutes
After 15 minutes of walking, Julia and Josie are facing each other at the same point (in distance).
How are their positions determined?Distance between Julia and Josie = 1,500 m
Julia's traveling rate (speed) per hour = 2,000 mph
Josie's traveling rate (speed) per hour = 4,000 mph
Walking time = 15 minutes
Distance formula = time x speed.
In 15 minutes, Julia's distance traveled = 500 m (2,000/60 x 15)
In 15 minutes, Josie's distance traveled = 1,000 m (4,000/60 x 15)
Thus, in 15 minutes, Julia and Josie have covered the 1,500 m distance separating them and will be at the same point.
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In order to use the formula sigma x = sigma/ calculate the standard deviation of the sampling distribution of the sample mean, which of the following condition must be met? n ge 30 The population's distribution is approximately Normal. The sample size is less than 10% of the population size. I only II only III only III and either I or II All three conditions must be met.
The standard deviation of the sampling distribution of the sample mean would be 5/√30, or 0.87.
In order to use the formula sigma x = sigma/ to calculate the standard deviation of the sampling distribution of the sample mean, all three conditions must be met. The first condition is that n must be greater than or equal to 30. This is because the larger the sample size, the more likely it is that the population's distribution is approximately normal. The second condition is that the population's distribution is approximately normal. This is because the Central Limit Theorem states that when the sample size is large enough (usually n ≥ 30) the sample means will have an approximately normal distribution. The third condition is that the sample size is less than 10% of the population size. This is because samples that are too large can lead to sample means that are not representative of the population.
To calculate the standard deviation of the sampling distribution of the sample mean, we can use the following formula:
σx = σ/√n
Where σ is the population standard deviation, and n is the sample size. For example, if the population standard deviation is 5, and the sample size is 30, then the standard deviation of the sampling distribution of the sample mean would be 5/√30, or 0.87.
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Cell phone Plan A costs $70 per month and comes with a free $500 phone. Cell phone
Plan B costs $50 per month but does not come with a phone. If you buy the $500 phone
and choose Plan B, how many months is it until your cost is the same as Plan A's?
The number of months before the cost is the same as Plan A is 25 months.
When the costs be the same?The linear equation that represents the cost of plan A = cost per month x number of months
$70 x m = $70m
The linear equation that represents the cost of plan B = (cost per month x number of months) + cost of the phone
($50 x m) + $500
= $50m + $500
When the costs are the same, the two equations would be equal
$70m = $50m + $500
Solve for m:
Combine similar terms: $70m - $50m = $500
Add similar terms: $20m = $500
Divide both sides of the equation by 20 = 500 / 20
m = 25 months
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In a certain college, 55% of the students are women. Suppose we take a sample of two students. Use a probability tree to find the probability
(a) that both chosen students are women.
(b) that atle a stone of the two students is a woman.
The probability that both chosen students are women is 0.3025 and the probability that at least one of the two students is a woman is 0.8075.
a) Probability of both chosen students being women = P(W1 ∩ W2) = P(W1) * P(W2)
= 0.55 * 0.55 = 0.3025
b) Probability of atleast one of the two students being a woman = P(W1 ∪ W2)
= P(W1) + P(W2) - P(W1 ∩ W2)
= 0.55 + 0.55 - 0.3025 = 0.8075
Therefore, the probability that both chosen students are women is 0.3025 and the probability that at least one of the two students is a woman is 0.8075.
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Find each percent of increase.round to the nearest percent 60 to 70
The percent of increase from 60 to 70 rounded to the nearest percent is 17%.
What is the percent of increase?Percent increase is simply the amount of increase from the initial value to the new value in terms of 100 parts of the initial value.
It is expressed as;
C = ((x₂ - x₁) / x₁)100%
Where x₁ is initial value and x₂ is new value
Given that;
Initial value x₁ = 60New value x₂ = 70Percentage increase C = ?Plug in the given values and solve for C.
C = ((x₂ - x₁) / x₁)100%
C = ((70 - 60) / 60) × 100%
C = ( 10 / 60) × 100%
C = 1/6 × 100%
C = 17%
Therefore, the percentage increase is 17%.
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Grade 5 Fractions how do you simplify fractions for 15/30
Answer:
Step-by-step explanation:
do you dislike waiting in line? supermarket chain kroger has used computer simulation and information technology to reduce the average waiting time for customers at stores. using a new system called quevision, which allows kroger to better predict when shoppers will be checking out, the company was able to decrease average customer waiting time to just seconds (informationweek website). assume that waiting times at kroger are exponentially distributed.
Probability of waiting between 15 and 30 seconds and probability of waiting for more than 2 minutes are 0.2462 and 0.0099 respectively.
Given that,
Do you find lines to be tedious? The grocery store chain Kroger has reduced the average wait time for customers at 2300 locations by using computer modeling and information technology. Kroger was able to reduce the typical customer wait time to to 26 seconds thanks to a new system called QueVision that helps the retailer to better anticipate when customers would be checking out.
P(Wait between 15 and 30 seconds)
= [tex]\int{15}{30} \frac{e^{-x/26}}{26} dx[/tex]
= 0.2462
P(wait for more than 2 minutes)
= 1 - P(Wait for less than or equal to 120 seconds)
= 1 - [tex]\int{0}{120} \frac{e^{-x/26}}{26} dx[/tex]
= 0.0099
As a result, the probabilities of waiting between 15 and 30 seconds and longer than 2 minutes are, respectively, 0.2462 and 0.0099.
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Which of the following is most likely the next step in the series?
The most likely the next step in the series wil be heptagon, the correct option is B.
What is Algebra?Algebra is the study of abstract symbols, while logic is the manipulation of all those ideas.
The acronym PEMDAS stands for Parenthesis, Exponent, Multiplication, Division, Addition, and Subtraction. This approach is used to answer the problem correctly and completely.
Given;
Figure 1 has 4 sides
Figure 2 has 5 sides
Figure 3 has 6 sides
Now, from the three given figures;
The next figure will have 7 sides
Therefore, by algebra the next figure will be heptagon.
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