Convert 3 feet to inches.

A) 4 inches

B) 9 inches

C) 12 inches

D) 36 inches

In every foot, there’s 12 inches. Since there are 3 feet, there are three 12 inches. We have to multiply 3 by 12 to find the total amount of inches.

3•12=36

D), there are 36 inches in 3 feet.

1 foot = 12 inches

3 feet x 12 inches = 36 inches

answer is D