SOLUTION: Pair of marking, 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 t

Question 983330: Pair of marking, 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. For one particular pair of markings, R is 56 mph when t is 9 seconds. Find the speed of a car that travels the given distance in 8 seconds.
Answer by Cromlix(4381) (Show Source): You can put this solution on YOUR website!
Hi there,
R varies inversely with the time T.
R = k/T
To find k the constant of proportionality
R = k/T
56 = k/9
Cross multiply
k = 9 x 56
k = 504
Formula: R = 504/T
Find the speed of a car that travels
the given distance in 8 seconds.
R = 504/T
R = 504/8
R = 63mph.
Hope this helps:-)
RELATED QUESTIONS
Pairs of markings a set distance apart are made on highways so that police can detect... (answered by stanbon)

Pairs of markings a set distance apart are made on highways so that police can detect... (answered by ankor@dixie-net.com)

Pairs of markings a set distance apart are made on highways so that police can detect... (answered by stanbon)

Speed trap on the highway set by the O.P.P. shows that the mean speed of cars is 103.4... (answered by edjones)

A recent survey in Malaysia revealed that 60% of the vehicles traveling on highways,... (answered by ewatrrr)

Speed trap on the highway set by the O.P.P. shows that the mean speed of cars is 103.4... (answered by edjones)

The highway patrol estimates that 60% of drivers on I-44 are within the speed limit. If... (answered by edjones)

A speed trap on the highway set by the O.P.P. shows that the mean speed of cars is 103.4 (answered by ikleyn)

Your family takes a road trip to the Great Smoky Mountains. On the way you drive on... (answered by josgarithmetic)