A bicycle tire has a radius of 5 inches. To the nearest inch, how far does the tire travel when it makes 8 revolution?

Answer 1

circumference = 2pi(r) = 2pi(5) = 10pi

8 revolutions means 8 x 10pi = 80pi = about 80(3.14159) = about 251.3272 inches = about 20.94 feet = about 7 yards (not enough for a 1st down in football games)