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Question 1059459: Pairs of markings a set distance apart are made on highways so that police can detect drivers exceeding the speed limit. Over a fixed distance, the speed R varies inversely with the time T. In one particular pair of markings, R is 4343 mph when T is 88 seconds. Find the speed of a car that travels the given distance in 77 seconds.
Requals= ? mph (Round to the nearest whole number.)
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! Pairs of markings a set distance apart are made on highways so that police can detect drivers exceeding the speed limit
. Over a fixed distance, the speed R varies inversely with the time T.
R = k/T
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In one particular pair of markings, R is 4343 mph when T is 88 seconds.
Solve for "k"::
4343 = k/88
k = 382184
Equation:
R = 382184/T
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Find the speed of a car that travels the given distance in 77 seconds.
Requals= ? mph (Round to the nearest whole number.)
R = 382184/77 = 4963.43
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Cheers,
Stan H.
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