Question

Use 3.14 for pi and explain or show your reasoning.

Answer 1

Answer:

1. 17.584 feet

2. 81.64 mm

3. 9

4. 12

Step-by-step explanation:

The formula for the circumference of a circle is 2 times pi (or 3.14 in your case) times the radius of the circle.

1. Using the above formula, we can plug in the radius:

2*3.14*2.8 = 17.584

2. This is similar to the above question, so we plug in the radius into the formula:

2*3.14*13 = 81.64

3. We know the circumference of the circle so we can plug it in the formula:

56.5 = 2*3.14*r

56.5 = 6.28*r

r = 8.996  (roughly 9)

4. This is similar to question 3 so we do the same thing:

75.4 = 2*3.14*r

75.4 = 6.28*r

r = 12