### Home > CC3 > Chapter 4 > Lesson 4.1.2 > Problem 4-21

4-21.

Kelso’s mom wants to put a floating blanket over the family’s circular wading pool to keep the heat in and the leaves out. The pool has a diameter of

How many square feet of blanket will Kelso’s mother need?

The formula to find the area of a circle is

.sq ft If the pool supply store charges

per square foot for the blanket, how much will the material for the blanket cost? Multiply your answer for part (a) by

.