kelso's mom wants to put a floating blanket over the families circular wading pool to keep the heat in and the leaves out the pool has a diameter of 10 feetA. How many square feet will kelso's mother need?B. if the pool supply stores charges $0.10 per square foot for the blanket how much will the material for the blanket cost

Area of a circle is A = pi*r^2.  If the pool dia (d) is 10 ft, then the poor rad (r) is 5 ft.  Thus, the area to be covered would be A = pi*(5 ft)^2 = (25 ft^2)*pi.

This material will cost (25 ft^2)*pi*($0.10 / ft^2).