Asked by kayla

Pairs of markings, a set distance apart, are made on highways so that the police can detect drivers exceeding the speed limit. Over a fixed distance, the speed R varies inversely with the time T. For one particular pair of markings, R is 35mph when T is 6 seconds. Find the speed of a car that travels the given distance in 5 seconds.

R= ___ mph
(round to the nearest whole number.)
Answered by Steve
inverse variation means that RT = k, a constant.

So, just set up things which are both equal to k:

35*6 = R*5

now just find the R value.
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