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OpenStudy (anonymous):
A car travels at an average speed of 68 miles per hour. How long does it take to travel 306 miles?
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jimthompson5910 (jim_thompson5910):
use the formula \[\Large D = r*t\]
jimthompson5910 (jim_thompson5910):
D = distance, which in this case is 306 miles r = rate (aka speed) which is 68 mph t = unknown but you use the formula above to solve for t
jimthompson5910 (jim_thompson5910):
D = r*t 306 = 68*t .... plug in the known values solve for t
OpenStudy (anonymous):
4.5
jimthompson5910 (jim_thompson5910):
yep so it will take 4.5 hours (4.5 hrs = 4 hrs, 30 minutes)
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