functions
posted by kerry .
a car is spinning at a rate of 4.3pi radians/s. how many rotations will it make in an hour?

1 h = 3600 s
4.3 pi * 3600 = 15480 pi rad / h
1 rotation = 2 pi radians
15480 pi / 2 pi = 7740 rotations / h
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