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
