Question

A company makes plastic beach balls with a radius of 2 inches. How many square inches of plastic does the company

need to make 10 beach balls? Use 3.14 for sr and round to the nearest tenth.
Recall the formula SA-4x2.
O 50.24 in^2
O 100.5 in^2
O 251.2 in^2
O 502.4 in^2

Answer 1

`A=502.4\ \text{inches}^2`

Explanation:

The radius of the ball, r = 2 inches

We need to find how many square inches of plastic does the company need to make 10 beach balls.

Let A be the area of 1 ball. Balls are in the form of spheres. The area of a sphere is given by :

`A=4\pi r^2`

For 10 balls,

`A=10* 4\pi r^2\\\\=10* 4 * 3.14* (2)^2\\\\=502.4\ \text{inches}^2`

Hence, the area of 10 beach balls is
`502.4\ \text{inches}^2`.