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The diameter of a tire is 2.5 ft. Use this measurement to answer parts a and b. Show all work to receive full credit.

Find the circumference of the tire.
About how many times will the tire have to rotate to travel 1 mile? (1 mile = 5,280 ft)

2 answers

a) Circumference = 2Ο€r
= 2Ο€(2.5 ft)
= 5Ο€ ft

b) Circumference of tire = 5Ο€ ft
Distance traveled in 1 rotation = 5Ο€ ft
Number of rotations to travel 1 mile = 5,280 ft / 5Ο€ ft
= 1056/Ο€ rotations
β‰ˆ 333.5 rotations
AAAaannndd the bot gets it wrong yet again!

C=Ο€d
so cut the circumference by half, and double the rotations needed.