Please help with this. Thank you

Final answer:

The difference between the circumferences of the outer and inner circles, given a diameter of 9m for the inner circle and an outer part thickness of 2m, is 4π m.

Explanation:

To find the difference between the circumferences of an outer circle and an inner circle, we first need to determine their respective radii and then apply the circumference formula C = 2πr.

The given diameter of the inner circle is 9m, hence its radius is 9m / 2 = 4.5m. The thickness of the outer part of the circle is 2m, so the radius of the outer circle is 4.5m + 2m = 6.5m.

The circumference of the inner circle is C_inner = 2π(4.5m) = 9π m, and the circumference of the outer circle is C_outer = 2π(6.5m) = 13π m.

The difference between the circumferences is therefore Couter - Cinner = 13π m - 9π m = 4π m.

Answer:

a) 83

b) mean and mode are both 83

Step-by-step explanation:

a) mean is the average. so add all the numbers and divide by the number of numbers.

88 + 73 + 81 + 83 + 79 + 94 + T = 83

7

b) median - put the numbers in numerical order, smallest to largest, what is the middle number (4th number) 73, 79, 81, 83, 83, 88, 94

mode - which number shows up most frequently?

Answer:

Friend PLEASE UPLOAD THE PICTURE PROPERLY IT IS NOT READABLE

The population for Lin's question is all teenagers in the United States who use smartphones. Selection bias and the method of surveying can cause data variations, and the sample size must be large enough and representative to obtain accurate findings.

The population for Lin's question regarding how many games teenagers in the United States have on their phones is all teenagers in the United States who own and use smartphones. It is implied that Lin is interested in the averages or trends among this specific age group with regard to digital game ownership.

When considering data collection, several factors can cause variations in the results. For instance, adolescents' access to different technologies, social and economic factors, and varying interests can all influence the number of games they have on their phones. Additionally, methods of surveying can affect accuracy, such as if the respondents are primarily contacted by landline or mobile phone, reflecting different demographic characteristics. The trend towards mobile phone usage as opposed to landlines, selection bias, and the changing communication preferences of younger generations all emphasize the need for researchers to employ diverse methods in collecting data to ensure representativeness of the surveyed population. Moreover, the sample size and how well it represents the overall population is critical in obtaining reliable results.

The sufficiency of the sample size depends on the population being studied. If the sample consists solely of students from one school, it may not be representative of the wider population of teenagers in the United States. However, when the population is as large and diverse as school-aged children and young adults across the entire United States, a much larger and varied sample would be needed to appropriately reflect the population and offer meaningful conclusions.

Answer:

About 1.94 seconds

Step-by-step explanation:

The quadratic equation gives the height of the squirrel from its starting position, which is 60 feet above ground.

The equation is:

[tex]h=-16t^2+60[/tex]

To find time it takes to "drop" 60 feet, means the ground level, where height is equal to 0.

Or, h = 0

We substitute h = 0 into the equation and solve for t:

[tex]h=-16t^2+60\\0=-16t^2+60\\16t^2=60\\t^2=3.75\\t=\sqrt{3.75}\\t=1.94[/tex]

So, it takes the squirrel about 1.94 seconds to drop 60 feet

It takes the squirrel about [tex]\( \boxd{1.94} \)[/tex] seconds to drop 60 feet.

Step 1

Given the equation [tex]\( h = -16t^2 + 60 \)[/tex] where  h is the height in feet and t is the time in seconds.

To find the time it takes for the squirrel to drop 60 feet (reaching the ground), we set [tex]\( h = 0 \)[/tex] and solve for t :

[tex]\[ -16t^2 + 60 = 0 \][/tex]

Add [tex]\( 16t^2 \)[/tex] to both sides:

[tex]\[ 16t^2 = 60 \][/tex]

Step 2

Divide both sides by 16:

[tex]\[ t^2 = \frac{60}{16} \]\[ t^2 = 3.75 \][/tex]

Take the square root of both sides:

[tex]\[ t = \sqrt{3.75} \]\[ t \approx 1.94 \][/tex]

So, it takes the squirrel about [tex]\( \boxd{1.94} \)[/tex] seconds to drop 60 feet.

Answer:

Step-by-step explanation:

1. n + y = 98

2. n = 76 - t

Answer:

11 and 87

Step-by-step explanation:

Let's create an equation to solve this. (I know that it is just subtraction, but equations are great ways to understand concepts.)

We can represent each number as "n"

In that case, we have:

n + (n - 76) = 98

Grouping n's:

2n - 76 = 98.

Adding 76 to both sides:

2n = 174

Dividing by 2:

87.

Plug-and-chug:

87 + (87 - 76) = 98

Thus, our final answer is that one number is 11, the other 87.

Answer:

8 1/4 or 8 2/8

Step-by-step explanation:

6+1= 7

5/8+5/8= 10/8 or 1 2/8

1 2/8 + 7= 8 2/8

Simplify

8 1/4 cups

In making his lemonade, Joe uses a total of 8 1/4 cups of water. He initially adds 6 5/8 cups, then adds an additional 1 5/8 cups when the lemonade is too strong.

Joe is making lemonade and initially adds 6 5/8 cups of water. When he finds it too strong, he adds another 1 5/8 cups of water. To calculate the total amount of water Joe uses, we add the two quantities of water together:

Adding these results together, Joe uses a total of 7 cups + 1 1/4 cups = 8 1/4 cups of water in his lemonade.

Learn more about Addition of Fractions here:

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Answer:

i think its 13

Step-by-step explanation:

Answer:

The vertex is: [tex](\frac{5}{2},-\frac{1}{4})[/tex]

Answer:

Step-by-step explanation:

C is the answer plz mark as brainliest answer

Answer:

1.) 1

Step-by-step explanation:

Answer:

 3y - 10

 ———

    2  

Step-by-step explanation:

Answer:

Here is the correct system of equations:

700x + 375y = 15,000

x + y = 27

The system of equations that models how many of each type of ticket the business should purchase is 700x + 375y = 15,000; x + y = 27. option D

How to write system of equation?

Let

x = the number of business class.

y = the number of economy

x + y = 27 (1)

700x + 375y = 15000 (2)

Multiply (1) by 700

700(x + y) = 700(27)

700x + 700y = 18900 (3)

Subtract (2) from (3)

700x + 375y = 15000 (2)

700x + 700y = 18900 (3)

-325y = -3900

Divide both sides by -325

y = -3900/-325

y = 12

Recall

x + y = 27

x + 12 = 27

x = 27 - 12

x = 15

Therefore, the business should purchase 15 business class and 12 economy class.

Complete question:

A business has $15,000 to spend on airline tickets to travel to a conference. It wants 27 of its employees to attend. The business wants to buy as many business-class seats as possible. The business-class seats cost $700. The economy-class seats cost $375. How many of each type of ticket should the business purchase?. A) 11 business class and 16 economy class. B) 12 business class and 15 economy class. C) 15 business class and 12 economy class. D) 16 business class and 11 economy class

Answer:

m ≠1  ( all m in R  except 1 )

Step-by-step explanation:

hello :

mx − y + 3 = 0.....(*)

(2m − 1)x − y + 4 = 0 ....(**)

multiply (*) by : -1       you have :   -mx+y-3=0   ....(***)

                                                    (2m − 1)x − y + 4 = 0 ....(**)

add(***) and(**)  : -mx+ (2m − 1)x+1 =0

(2m-m-1)x+1=0

(m-1)x = -1

this system have no solution  if : m-1≠0   means : m ≠1

Answer:

  B.  $1300

Step-by-step explanation:

The 100 hats remaining in inventory are the first 100 hats purchased in the period, so are 50 hats purchased for $12 each in June, and 50 hats purchased for $14 each in July. The value of this inventory is ...

  50($12) +50($14) = $600 +700 = $1300

Answer:

1225

Step-by-step explanation

Answer: A. The range of both plots is about the same.

Step-by-step explanation:

The question asks about boxplots but does not provide the actual boxplots to analyze. Nonetheless, the answer describes what each statement means in relation to boxplots. The true statement would depend on graphical interpretation of the provided boxplots.

Without actual boxplots, it is not possible to definitively answer this question. However, I can provide you with a brief description of each of the given options.

In general, to get a correct answer, study the two boxplots together, comparing their ranges, means, and medians.

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Answer:

D. Exponential

Step-by-step explanation:

The point are going down at an exponential rate.

Answer:

a. the values are the same.

Step-by-step explanation:

The sine = y-coordinate / hypotenuse. The unit circle has hypotenuse = 1, so

the sine = y /1 = y.

Final answer:

The value of the sine of an angle on the unit circle is the same as the y-coordinate of the corresponding point on the circle, as the sine function is defined as the ratio of the opposite side to the hypotenuse in a right triangle.

Explanation:

When looking at the unit circle, we can observe that the value of the sine of an angle is indeed the same as the y-coordinate of the point on the unit circle at that angle. In other words, if we take a point on the unit circle at an angle θ from the positive x-axis, its coordinates can be expressed as (cos(θ), sin(θ)). Therefore, the sine of the angle gives us the y-coordinate of the point on the circle. This relationship is a direct consequence of how the trigonometric functions are defined in the context of a right triangle, where the sine of an angle is the length of the side opposite to the angle (y) divided by the hypotenuse (which is 1 for the unit circle).

Hey!!!

Here's your answer:

Actually the value of pi is 22/7 and when we divide 22 by 7 ,it equals to 3.142857143.

So,the first 4 digits of pie is 3.142

There is one miracle about pi.

And that is

first digit of pie(3)

= The third month is march.

Albert Einstein was born in march14 and Stephen Hawking was dead in march 14.

Sorry,if u did not understand what I mean to say...

I am not good at giving explanations.....:(

Answer:

46.5 inches

Step-by-step explanation:

if you plug all the numbers in and then change them into simple shapes, like a square, rectangle, and triangle, you can just add the areas to those shapes and add them together.

The area of the object is: 61.5 Sq.in

What is the Area of the Composite figure?

The formula for area of a rectangle is:

Area = Length * Width

Formula for the Area of a  Trapezium is:

Area = ¹/₂ * (sum of parallel sides) * height

Area of composite figure is: (¹/₂ * (W + Y - U) * (V - X - Z)) + [(X - Z) * (Y - U)] + (Y * Z)

Area of composite figure is: (¹/₂ * (8 + 8 - 3) * (5 - (6 - 4)) + [(6 - 4) * (8 - 3)] + (8 * 4)

= 19.5 + 10 + 32

= 61.5 Sq.in

Answer:

- 1/2

Step-by-step explanation:

[tex]slope = \frac{1 - 6}{8 - ( - 2)} = \frac{ - 5}{8 + 2} = \frac{ - 5}{10} = - \frac{1}{2} \\ [/tex]

Answer:

If the long side is down then the length of the base is 81 sq.m.

If the short side is down then the length of the base is 20.25 sq.m.

Step-by-step explanation:

162/4 is 40.5 that means if this were a square it would be 40.5 sq.m. On each side, if the base is longer you multiply 40.5 by 2 (or whatever youre supposed to honestl) and if the base is shorter you divide by 2 (or whatever you were supposed to)

Answer:

8m

Step-by-step explanation

a) After 4 years the profit will change from negative to positive.

b)after 4 years the profit will be lowest.

Because the equation is a quadratic equation so, it will be increasing.

c) after 4 years the profit will be 5.

Step-by-step explanation:

a) After 1 year = 2(1) -6(1) -3

= 2-9

= -7

It's negative

After 2 years = 2(4) -6(2) -3

= 8-12-3

= -7

It's negative

After 3 years = 2(9) -6(3) -3

= 18 - 18 -3

= -3

It's negative

After 4 years = 2(16) -6(4) -3

= 32 -24-3

= 5

It's positive

After 4 years the profit will change from negative to positive

b) after 4 years the profit will be lowest.

Because the equation is a quadratic equation so, it will be increasing.

c) profit = 2(16) - 6(4) -3

= 32 -24 - 3

= 5

after 4 years the profit will be 5

Answer:

$8.75

Step-by-step explanation:

35 * .25 = $8.75

Answer:

if x = 11 then y = 660

Step-by-step explanation:

when the x increases by 1 at a constant rate, the y increases by 60 at a constant rate

so, if we keep moving forward with the table, you'll easily see that when x = 11, y = 660

The value of y would be 275 more in the table than on the graph when x = 11. Hence the correct option is 4.

The value of y would be 275 more in the table than its value on the graph when x = 11.

By substituting x = 11 into the equation y = 10 + 2x, we get y = 10 + 2(11) = 32 for the graph.

From the table, the corresponding value for y when x = 11 is 307.

Thus, the difference in the value of y between the table and the graph is 307 - 32 = 275.

Answer:

Option D: 225 zł

Step-by-step explanation:

(English question:

Mr. Bartek bought 15 flower seedlings and paid PLN 67.50 for them. Mr. Michał bought 50 cuttings at the same price for one piece.

How much more did Michał pay for seedlings than Mr. Bartek? Choose the right answer from the given ones.

A. 22.50 PLN B. 157.50 PLN C. 202.50 PLN D. 225 PLN)

We can solve this problem using a rule of three:

If Mr. Bartek bought 15 flowers seedlings for 67.5, Mr. Michal that bought 50 flowers seedlings will pay what price (If he pays the same price per unit that Mr. Bartek paid)?

15 seedlings -> PLN 67.5

50 seedlings -> PLN X

15/50 = 67.5/X

X = 50*67.5/15 = 225

The correct option is D: 225 zł

Answer:

the answer is c.

Step-by-step explanation:

that is for the second question