Question

Find the area of the circle to the nearest tenth, if n=3.14 and a=5in.

a.78.5
b.69.4
c.31.5
d.47.5

Answer 1

a. 78.5

Explanation:

We want to find the area of a circle with radius

`r = 5in`

The formula for calculating the area of a circle is

`Area = \pi {r}^(2)`

We substitute r=5 inches and π=3.14 into the formula to get.

`Area = 3.14 * {5}^(2)`

`Area = 3.14 * 25 = 78.5 {in}^(2)`