Answer:
C = 18.2 in.
Explanation:
Step 1: Find the diameter of the circle:
The normal formula for the circumference of a formula is given by:
C = πd, where
- C is the circumference,
- and d is the diameter of the circle.
We're given the radius, r, and since the diameter is simply twice the radius, we can find the diameter by multiplying 2.9 by 2:
d = 2r
d = 2(2.9)
d = 5.8
Thus, the diameter is 5.8 in.
Step 2: Find the circumference, C (rounded to the nearest tenth), by plugging in 5.8 for d and 3.14 for π in the circumference formula:
C = 3.14(5.8)
C = 18.212
C = 18.2
Thus, the circumference of the circle is about 18.2 in.