What is the equation of this graph

we should claim a warranty of 11 years (rounded to the nearest whole number) to ensure that we replace at most 5% of the hot water heaters that we sell.

What is mean ?

Mean can be defined as the ratio of sum of the given observations and total number of observations.

a) Since the life spans of the hot water heaters are normally distributed with a mean of 13 years and a standard deviation of 1.5 years, we can use the empirical rule to estimate the range of years we would expect the hot water heater to last. The empirical rule states that for a normal distribution, approximately 68% of the data falls within one standard deviation of the mean, approximately 95% of the data falls within two standard deviations of the mean, and approximately 99.7% of the data falls within three standard deviations of the mean.

Using this information, we can estimate that the range of years we would expect the hot water heater to last is approximately 10.5 to 15.5 years. This is because one standard deviation below the mean is 13 - 1.5 = 11.5 years, and one standard deviation above the mean is 13 + 1.5 = 14.5 years. Therefore, we can reasonably expect the hot water heater to last between 10.5 and 15.5 years with about 95% confidence.

b) To set the warranty on the product so that we have to replace at most 5% of the hot water heaters that we sell, we need to find the number of years that corresponds to the 5th percentile of the distribution. This is the value below which 5% of the data falls.

We can use a standard normal distribution table or a calculator to find the z-score corresponding to the 5th percentile, which is -1.645. We can then use the formula z = (x - mu) / sigma to find the number of years, x, that corresponds to this z-score.

-1.645 = (x - 13) / 1.5

Solving for x, we get x = 10.83 years.

Therefore, we should claim a warranty of 11 years (rounded to the nearest whole number) to ensure that we replace at most 5% of the hot water heaters that we sell

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The value of x in the given figure is 31.76.

Trigonometry is a branch of mathematics that studies relationships between side lengths and angles of triangles.

In the given triangle, there are two triangles.

Let us find the length of the perpendicular line by using pythagoras theorem.

16² + a² = 22²

256 + a²  = 484

a²  =484-256

a² = 228

a=15.09 = 15

Now let us find the value of x.

Now 44-16= 28

28²+15² = x²

784 + 225 =  x²

1009 = x²

Square root on both sides

x=31.76

Hence, the value of x in the given figure is 31.76.

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Answer:

Length: 17 cm

Width: 4 cm

Step-by-step explanation:

Let x be the width of the rectangle.

length : 4x+1

x+x+4x+1+4x+1= 42

10x= 40

x= 4

4x+1= 4(4)+1

= 17

Null hypothesis: The probability of at least two people in each classroom of 25 students sharing a birthday is less than or equal to 40%.

Alternative hypothesis: The probability of at least two people in each classroom of 25 students sharing a birthday is greater than 40%.

Simulation Results:

Simulation 1: 8 out of 16 classrooms had at least 2 students sharing a birthday.

Simulation 2: 9 out of 16 classrooms had at least 2 students sharing a birthday.

Simulation 3: 7 out of 16 classrooms had at least 2 students sharing a birthday.

Simulation 4: 11 out of 16 classrooms had at least 2 students sharing a birthday.

Simulation 5: 7 out of 16 classrooms had at least 2 students sharing a birthday.

Simulation 6: 6 out of 16 classrooms had at least 2 students sharing a birthday.

Simulation 7: 8 out of 16 classrooms had at least 2 students sharing a birthday.

Simulation 8: 6 out of 16 classrooms had at least 2 students sharing a birthday.

Simulation 9: 10 out of 16 classrooms had at least 2 students sharing a birthday.

Simulation 10: 8 out of 16 classrooms had at least 2 students sharing a birthday.

Simulation 11: 7 out of 16 classrooms had at least 2 students sharing a birthday.

Simulation 12: 11 out of 16 classrooms had at least 2 students sharing a birthday.

Simulation 13: 8 out of 16 classrooms had at least 2 students sharing a birthday.

Simulation 14: 7 out of 16 classrooms had at least 2 students sharing a birthday.

Simulation 15: 10 out of 16 classrooms had at least 2 students sharing a birthday.

Simulation 16: 10 out of 16 classrooms had at least 2 students sharing a birthday.

Proportion of classrooms with at least 2 students sharing a birthday = (8+9+7+11+7+6+8+6+10+8+7+11+8+7+10+10)/16 = 0.7125

The mean number of classrooms with at least 2 students sharing a birthday is 0.7125. We can use this value to calculate the t-statistic.

t-statistic = (0.7125 - 0.4) / (sqrt(0.4 * 0.6 / 16)) = 5.766

Using a one-tailed t-test with 15 degrees of freedom and an alpha level of 0.05, the critical t-value is 1.753. Since the calculated t-statistic is greater than the critical t-value, we can reject the null hypothesis.

The p-value is very small (less than 0.0001), indicating strong evidence against the null hypothesis.

Therefore, we can conclude that there is sufficient evidence to suggest that the probability of at least two people in each classroom of 25 students sharing a birthday is greater than 40%.

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The inequality that shows the possible amounts of pisquets is 8 < x < 19

From the question, we have the following parameters that can be used in our computation:

My friend Vreel has less than 19 pisquets and more than 8 pisquets

Using x for Pisquets, we have:

x < 19 and x > 8

When the inequality is combined, we have

8 < x < 19

Hence, the inequality is 8 < x < 19

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The measure of central location most often reported for annual income and property value data is the mode.

There are three measures of central tendency of a data-set, which are defined as follows:

Among those three measures, the mode is the one that gives the observation that appears the most often in a data-set, hence the correct option is given by option a.

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The angles in degree for the given triangle is 74 degrees, 78 degrees and 28 degrees.

In geometry, an angle is the figure formed by two rays, called the sides of the angle, that share a common endpoint, called the vertex of the angle. Angles are usually measured in degrees or radians and are used to describe the amount of rotation between two intersecting lines or to measure the size of a shape. Angles can be acute (less than 90 degrees), right (exactly 90 degrees), obtuse (greater than 90 degrees but less than 180 degrees), straight (exactly 180 degrees), or reflex (greater than 180 degrees but less than 360 degrees). Angles play an important role in various fields of study such as mathematics, physics, engineering, and architecture.

Here,

To find m23, we need to use the fact that the sum of the angles in a triangle is 180 degrees.

We know that m21 + m23 + m32 = 180 degrees. Rearranging this equation, we get m23 = 180 degrees - m21 - m32.

From the given information, we have:

m21 = (5x + 4) degrees

m32 = 180 degrees - mz2 - mz3 = 180 degrees - (6x - 6) - (10x + 12) = 174 - 4x degrees

Substituting these values into the equation for m23, we get:

m23 = 180 degrees - m21 - m32

= 180 degrees - (5x + 4) - (174 - 4x)

= 6x + 2 degrees

Therefore, m23 is 6x + 2 degrees.

5x+4+6x-6+168-10x=180

x+166=180

x=14

5x+4=5*14+4

=74°

6x-6=6*14-6

=78°

168-10x=168-10*14

=28°

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100 centimetres make up one metre. 100 centimetres must be multiplied by 0.0328084 to equal one metre in feet. There are 3.28084 feet as a result.

100 cm in one metre

1 cm = 0.0328084 ft

100 cm in 1 metre equals 0.0328084 feet, or 3.28084 feet.

100 centimetres make up one metre. 100 centimetres must be multiplied by 0.0328084 in order to convert 1 metre in cm to feet. This math will show us how many feet are in one metre, centimetre. To proceed step-by-step, we must first multiply one metre by one hundred centimetres. We will get 100 centimetres as a result.Following that, we must multiply 100 centimetres by 0.0328084. This figure represents the number of feet in one centimetre. We can convert 1 metre cm to feet by multiplying these two values, which gives us 3.28084 ft. The length of things can be measured using this conversion in both metric and imperial systems. When attempting to measure objects precisely, it can be helpful to know how to convert between the two systems.

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Answer: √177

Step-by-step explanation:

6²+9²=c²

36+81=c²

117=c²

√117=√c²

√177 = c

(√177 can also be watered down to ±3√13 but √177 is one of the answer choices so yeah)

All three options involve conducting a survey using random sampling, which is the most appropriate method for creating an estimate of the percentage of district residents who support the building of a new middle school. The correct answer would be A, B, or C, depending on the availability of resources.

The most appropriate method for creating an estimate of the percentage of district residents who support the building of a new middle school would likely be a survey using random sampling.

Random sampling is a statistical method in which a representative sample of a larger population is selected, in order to make inferences about the population as a whole. When conducting a survey, random sampling helps to ensure that the sample is representative of the population, reducing the potential for bias.

There are several different types of surveys that could be used to estimate the level of support for a new middle school, including telephone surveys, online surveys, and in-person surveys.

Complete question:

The superintendent of a large school district wants to estimate the percentage of district residents who support the building of a new middle school. To gather data, the superintendent will select a random sample of district residents. What is the most appropriate method for the superintendent to estimate the percentage of district residents who support the building of a new middle school?

A. Telephone survey using random sampling

B. Online survey using random sampling

C. In-person survey using random sampling

D. Observing the behavior of district residents

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The function that represent the balance A in the account after t years is f(t) = 13000( 1.013 )^( 2t ).

This question is incomplete, the complete question is:

Rawan deposits $13,000 into an account that pays 2.6% annual interest compounded every 6 months.

Write a function to represent the balance A in the account after t years.

The formula accrued amount in a compounded interest is expressed as;

A = P( 1 + r/n )^( n × t )

Where A is accrued amount, P is principal, r is interest rate and t is time.

Given that;

First, convert R as a percent to r as a decimal

r = R/100

r = 2.6/100

r = 0.026

Given that time = t.

A = P( 1 + r/n )^( n × t )

f(t) = 13000( 1 + 0.026/2 )^( 2 × t )

f(t) = 13000( 1 + 0.026/2 )^( 2t )

f(t) = 13000( 1 + 0.013 )^( 2t )

f(t) = 13000( 1.013 )^( 2t )

Therefore, the accrued amount after t years is f(t) = 13000( 1.013 )^( 2t ).

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The coordinate from point of intersection is (3, 11)

To find the intersection point of the diagonals of ABCD, we need to find the point where the lines containing the diagonals intersect.

The diagonal connecting A and C has slope:

m₁ = (y₂ - y₁) / (x₂ - x₁)

= (-2 - 6) / (3 - 3)

= undefined

This is because the line is vertical, and so has no slope. However, we can still write an equation for this line using the x-coordinate of point C:

x = 3

The diagonal connecting B and D has slope:

m₂ = (y₂ - y₁) / (x₂ - x₁)

= (-4 - 8) / (1 - 5)

= -3/2

We can write an equation for this line using point-slope form and the coordinates of point B:

y - y₁ = m₂(x - x₁)

y - 8 = (-3/2)(x - 5)

y - 8 = (-3/2)x + 15/2

y = (-3/2)x + 31/2

Now we can find the point of intersection by solving the system of equations given by the two lines:

x = 3

y = (-3/2)x + 31/2

Substituting x = 3 into the second equation, we get:

y = (-3/2)(3) + 31/2

y = 22/2

y = 11

The coordinate is (3, 11)

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It is possible for equivalent expressions to make the left and right expressions have the same value

An expression is combination of variables, numbers and operators.

We have to check whether it is  possible to make the left and right expressions have the same value

If two algebraic expressions are equivalent, then the two expressions have the same value when we plug in the same value for the variable.

For example 2x+4=2(x+2)

When we plug in x as 2

2(2)+4=2(2+2)

4+4=2(4)
8=8

Hence, its possible to make the left and right expressions have the same value when the expressions are equivalent.

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0700 military time is 7:00 AM in the 24-hour time format used by the military, also known as the 24-hour clock.

The 24-hour clock is a timekeeping system that uses a continuous count of 24 hours, instead of two sets of 12 hours for AM and PM. In this system, each hour of the day is numbered from 0 to 23, and is referred to as "military time" or "24-hour time". So, 0700 military time is equivalent to 7:00 AM, with the "0" indicating the first hour of the day. This system is commonly used in the military, as well as in other fields where precise and standardized timekeeping is important, such as aviation and public transportation.

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Answer:

A) [tex](3,5)[/tex] and [tex](-4,12)[/tex]

Step-by-step explanation:

[tex]x+y=8\\x+(x^2-4)=8\\x^2+x-4=8\\x^2+x-12=0\\(x-3)(x+4)=0\\x_1=3,\,x_2=-4\\\\x_1+y=8\\3+y=8\\y_1=5\\\\x_2+y=8\\-4+y=8\\y_2=12[/tex]

The Weight of mini horse is 465 lbs.

A ratio is a comparison between two amounts that is calculated by dividing one amount by the other. The quotient a/b is referred to as the ratio between a and b if a and b are two values of the same kind and with the same units, such that b is not equal to 0. Ratios are represented by the colon symbol (:). As a result, the ratio a/b has no units and is represented by the notation a: b.

Given:

A calf and a mini-horse weigh 705 lbs combined.

The ratio of their weights is 16:31 respectively.

let the Common ratio be x.

So, weight of calf = 16x and Weight of mini horse = 31x

Thus, 16x + 31x = 705

47x = 705

x= 705/ 47

x= 15

Then, the Weight of mini horse = 31x = 31(15)= 465 lbs.

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Ryan has the faster time when compared to each of their teams,

"Information available from the question"

The time taken by Nick is 10.8 seconds.

The mean time taken by Nick is 11.4 seconds.

The standard deviation of Nick is 0.4 seconds.

The time taken by Ryan is 11.2 seconds.

The mean time taken by Ryan is 11.5 seconds.

The standard deviation of Ryan is 0.1 seconds.

The z-score of Nick is:

[tex]z_1=\frac{10.8-11.4}{0.4}[/tex]

[tex]z_1=-1.5[/tex]

The z-score of Ryan is:

[tex]z_2=\frac{11.2-11.5}{0.1}[/tex]

[tex]z_2=-3[/tex]

Thus, Ryan z-score is lower, so Ryan has the faster time when compared to each of their teams.

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Answer:

18

Step-by-step explanation:

The median of a set of data is the value that separates the lower and upper halves of the data. To find the median, the data must be arranged in numerical order.

The data, arranged in numerical order, is:

5, 5, 6, 7, 8, 9, 10, 10, 12, 14, 15, 17, 18, 18, 18, 20

Since the number of data points is an odd number (17), the median is simply the middle value, which is:

18

So the correct answer is A) 18.

Answer: C

Step-by-step explanation:

To find the median, arrange the numbers in sequential order.

5, 5, 6, 7, 8, 9, 10, 10, 12, 14, 15, 17, 18, 18, 18, 20

When there are an odd number of data in the set, choose the middle number in the set. For example, see the following data set.

2, 4, 6, 8, 9

The middle number in the data set is 6, so it is the median.

When there is an even number of data in the set, choose the middle two numbers, add them together, and then divide them by 2.

There are 16 numbers in this data set. We need to find the two middle numbers in the set.

5, 5, 6, 7, 8, 9, 10, 10, 12, 14, 15, 17, 18, 18, 18, 20

10 and 12 are the two middle numbers in the set.

10 + 12 = 22

22/2 = 11

Median = 11

By answering the given question, we may state that Hence, the interest appropriate response is X = 40 and 8x + 10y = 600

Divide the principal by the interest rate, the length of time, and other factors to arrive at simple interest. Simple return = principal + interest + hours is the marketing formula. This method makes it easiest to calculate interest. The most typical technique to figure out interest is as a portion of the principal sum. He will only pay his share of the 100% interest, for example, if he borrows $100 from a friend and agrees to pay it back with 5% interest. $100 (0.05) = $5. When you borrow money, you must pay interest, and when you give it out, you must charge interest. Interest is often determined as an annual percentage of the loan total. The interest on the loan is this percentage.

Selling x calendars will cost 8x, while selling y mugs will cost 10y. The scenario is therefore represented by the following system of inequalities in order for her to reach her objective of selling at least $600 worth of stuff, including at least 40 calendars:

(Total cost of goods sold must be at least $600; 8x + 10y)

x ≥ 40 (must sell at least 40 calendars) (must sell at least 40 calendars)

In the first inequality, you'll see that we used the symbol "" rather than ">" since Dominique needs to sell at least $600 worth of goods, not just more than $600.

Hence, the appropriate response is

X = 40 and 8x + 10y = 600

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The previous population, of the city is 55,000

A percentage is a number or ratio that can be expressed as a fraction of 100. If we have to calculate percent of a number, divide the number by the whole and multiply by 100.

Given that, a city's current population is 40,700, decreased by 26% after it was measured last time, the

Let the previous population, of the city, be x,

Therefore,

x - 26% of x = 40,700

x(1-26%) = 40,700

0.74x = 40,700

x = 55,000

Hence, the previous population, of the city is 55,000

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The total number of possibilities for four digit pin with the condition of no digit is repeated is equal to 5040.

Total number of digit used to form pin = 4

Condition is : No digit is repeated.

Number of digits are :

( 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 )

Total digits are = 10

Number of possibilities to form four digit pin with no digit repeated

=  ¹⁰P₄

= ( 10! ) / ( 10 - 4 )!

= ( 10 × 9 × 8 × 7 × 6! ) / 6!

= 10 × 9 × 8 × 7

= 5040

Therefore, the total number of possibilities to form four digit pin with the given condition is equal to 5040.

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The second option is the correct representation of the given context.

A number line is a one-dimensional horizontal line where we can represent any real number.

The origin of the number line is represented by zero left to it are all negative real numbers and right to it are all positive real numbers.

Look at the model, it starts at 125 and drops to 90.

If she has $125 and spends $35 on gas, the remaining balance is reduced by that amount.

125 - 35 = 90.

Q. Holly has $125 she spends $35 on gas for her car which model represents how much money holly has left?

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The symbol of mean is "μ". The population mean, or average score for the population on a certain variable, equation as follows:

μ = ( Σ Xi ) / N

The term "mean" is simply the mathematical average of a set of two or more integers. The arithmetic mean technique, which utilizes the sum of the series' values, and the geometric mean method, which employs the average of a set of products, are only two of the methods available to determine the mean for a given collection of data. Nonetheless, most of the time, the outcomes of the various methods for determining a simple average are essentially the same. The arithmetic mean and the geometric mean are two different types of means that may be determined. By adding all the numbers in a set and dividing by the total number of integers in the set, the arithmetic mean is determined. The equation of mean will be:

μ = ( Σ Xi ) / N.

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The height of the rectangular prism whose volume is 9 cubic inches and the base area is 4 square inches will be 2.25 inches.

Volume is a measurement of three-dimensional space that is utilized. It is frequently mathematically quantified using SI-derived units or different imperial or US traditional units. The concept of length is linked to the notion of capacity.

The volume of the prism is given as,

Volume = (Base area) x (Height)

The rectangular prism has a volume of 9 cubic inches. The area of the base is 4 square inches.

Then the height of the rectangular prism is given as,

9 = 4 h

h = 9 / 4

h = 2.25 inches

The height of the rectangular prism whose volume is 9 cubic inches and the base area is 4 square inches will be 2.25 inches.

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Answer:

10[tex]\sqrt{50}[/tex]

Step-by-step explanation:

Since it's a isosceles right triangle, so

x^2+x^2=100^2

2x^2=10000

x^2=5000

x=[tex]\sqrt{5000}[/tex]=10[tex]\sqrt{50}[/tex]

Answer:

Step-by-step explanation:

If you got together on December 27, 2021, your 1-month anniversary would be on January 27, 2022, which is exactly 31 days later.

Your 2-month anniversary would be on February 27, 2022, which is exactly 61 days later. Since February has only 28 days in 2022, it means that your 2-month anniversary would fall on the last day of February.

Your 3-month anniversary would be on March 27, 2022, which is exactly 90 days later.

Answer:  

x = -3

Step-by-step explanation:

I did this before

Answer:

a. After 4 years, the amount in the account can be found by using the formula for simple interest:

A = P * (1 + r * t), where P is the initial deposit, r is the annual interest rate as a decimal, and t is the number of years.

Plugging in the values, we get:

A = $2,000 * (1 + 0.05 * 4) = $2,000 * 1.2 = $2,400

So after 4 years, there will be $2,400 in the account.

b. After 16 years, the amount in the account can be found using the same formula:

A = $2,000 * (1 + 0.05 * 16) = $2,000 * 1.8 = $3,600

So after 16 years, there will be $3,600 in the account.

c. To find the number of years it will take for the account to contain $2,500, we can use the formula:

t = (A - P) / (P * r), where A is the desired amount.

Plugging in the values, we get:

t = ($2,500 - $2,000) / ($2,000 * 0.05) = ($500) / ($100) = 5 years

So it will take 5 years for the account to contain $2,500.

d. To find the number of years it will take for the account to contain $3,000, we can use the same formula:

t = ($3,000 - $2,000) / ($2,000 * 0.05) = ($1,000) / ($100) = 10 years

So it will take 10 years for the account to contain $3,000.

Step-by-step explanation:

pls mark brainlist