Answer :

SINAZEUS
a)
[tex]2.5\pi = 7.85[/tex]

b) i think that you should divide the distance by the circumference :
[tex]5280 \div 7.85 = 672.6115[/tex]


hope this helps
(I'm not completely sure about part b)


good luck
StarHeartProductions
Hey,
To find the circumference of the tire multiply pi times radius time 2. Radius is equal to half of diameter. r = 1.25

C = 2 • π • r
C = 2  • 3.14 • 1.25
C = 6.28 • 1.25
C = 7.85 ft

To find how many times the tire will rotate divide the number of feet in a mile (5,280).
5,280 ÷ 7.85 = 672.611464968

a. Circumference = 7.85
b. The tire will rotate approximately 673 times in one mile.

Hope this Helped! 
Cheers,
Izzy

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