The formula S=30fd relates the speed S in miles per hour a car was traveling to

Question

The formula S=30fd relates the speed S in miles per hour a car was traveling to the length d in feet that the car skidded when brakes were applied. The variable f is the coefficient of friction, which varies depending on the road surface and the condition of the tires. Which sets of numbers contain the value of S for f=0.8 and d=51? Choose from the following below then explain why! A+ for good answer.
A. integers, rational numbers, real numbers
B. irrational numbers, real numbers
C. whole numbers, integers, rational numbers, real numbers
D. natural numbers, whole numbers, integers, rational numbers, real numbers

Now explain why. Thanks :)

Explanation / Answer

S for f=0.8 and d=51? Choose from the following below then explain why! A+ for good answer.

S = (30*0.8*51) = 34.9857113690718

A. integers, rational numbers, real numbers it is not integer
B. irrational numbers, real numbers yes it is irration number.
C. whole numbers, integers, rational numbers, real numbers   it is not integer
D. natural numbers, whole numbers, integers, rational numbers, real numbers   it is not integer

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