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2 years ago

Help me answer question 8a and b, and I’ll give u 10 points lol

Mathematics

1 answer:

iren [92.7K]2 years ago

3 0

Answer:

Step-by-step explanation:

Find h when v = 20 and r = 3

Putting values in the formula

20 = (3.14)(3)2h

20 = (3.14)(9)h

20 = 28.26h

20/28.26 = h

R when v = 100 and h = 5

100 = (3.14)r2(5)

100/5 = 3.14r2

20 = 3.14r2

20/3.14 = r2

6.36 = r2

Square root on both sides

2.52 = r

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Find the slope (rate of change) of each representation. Please explain how you got it.

OleMash [197]

Answer:

m = -3/2

Step-by-step explanation:

To find the slope of the representation, use the slope formula: $m=\frac{y_2-y_1}{x_2-x_1}$

I'll pick (-4, 9) and (-2, 6) in this instance.

$m=\frac{9-6}{-4-(-2)}\\\\m=-\frac{3}{2}$

Therefore, the slope of the representation is -3/2.

5 0

3 years ago

Read 2 more answers

Isaac and Shonda can rent a canoe for $12 per hour and a mountain bike for $9 per hour. Together, they have $138 to spend. Let c

trapecia [35]

Answer:

12c + 9m ≤ 138

Step-by-step explanation:

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2 years ago

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Given the speeds of each runner below, determine who runs the fastest.

Tju [1.3M]

Answer:

Stephanie

Step-by-step explanation:

To compare each runner's speed, we must convert them all to the same units.

Let's convert then all to feet per second.

1. Stephanie

Speed = 13 ft/s

2. Emily

$\text{Speed} = \dfrac{\text{538 ft}}{\text{45 s}} = \text{12.0 ft/s}$

3. Brooke

$\text{Speed} = \dfrac{\text{1 mi}}{\text{560 s}} \times \dfrac{\text{5280 ft}}{\text{1 mi}} = \text{9.4 ft/s}$

4. Katie

$\text{ speed} = \dfrac{\text{747 ft}}{\text{1 min}} \times \dfrac{\text{1 min}}{\text{60 s}} = \textbf{12.4 ft/s}$

Stephanie is the fastest runner.

7 0

3 years ago

What is the answer for 40÷1+3-(3×7)+7-5

forsale [732]

It equals 24 bc 40/1=40 40+3=43 43-21=22 22+7=29 and 29-5=24

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3 years ago

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A machine can produce 14 inches of ribbon every 2 minutes. How many feet of ribbon can the machine make in one hour? Complete th

mylen [45]

Answer:

35 feet of ribbon.

Step-by-step explanation:

The rate of 14 inches per every 2 minutes would equal 30 two-minute intervals as 60 minutes (an hour)/2 minutes = 30. 14 x 30 = 420 inches in one hour, which reduces to 35 feet since 420inches/12 inches (one foot) = 35.

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2 years ago