Question 176955
the amountof time for a trp varies inversely as the speed traveled.
t = k/s
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a car reached its destination in 9 hours traveling at 60 mph .
Find "k" by substituting these numbers:
9 = k/60
k = 540
Equation: t = 540/s
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 what must its speed be to get there in only 8 hours? 
8 = 540/s
s = 540/8 = 135/2= 67.5 mph
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Cheers,
Stan H.