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Mathematics, 24.05.2020 23:59 slrc6130

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 74 mph when T is 7 seconds. Find the speed of car that travels the given distance in 9 seconds.

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