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A mountain bike tire completes 20 revolutions and travels 136 feet. Rounded to the nearest inch, what is the diameter of the bike’s tire?

I cannot figure out how to do this question can someone help me ?  

06/08/18

Let g(x) = 2x and h(x) = x2 + 4.

Let g(x) = 2x and h(x) = x2 + 4.Evaluate (g ∘ h)(3)

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