A circular playground for a daycare center is to be covered with square tiles that are 9 inches on each side. The circle has a diameter of 12 ft. The tiles are packaged in boxes of 25 tiles. How many boxes of tiles are needed?

9 boxes

Step-by-step explanation:

Since 1 ft= 12 inches then with diameter of 12 ft, radius becomes 6 ft and converted to inches it's 6*12=72 in

Area of 1 tile= 9*9=81

Number of tiles=

Number of boxes= 202/25=8.08 boxes hence 9 boxes

f(x) has value 150 at x= 0

and 0 at x= 3

so d(f(x))/dt = slope = -150/3 = -50