Question 84717
At 50 mph, in 30 minutes (1/2 hour) you would go 25 miles, not the 15 miles you got. 
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d = r*t
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d = 50*(1/2) = 50/2 = 25 miles
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Since it was 62 miles to Caanan when he started and then he drove 25 miles toward Caanan,
the remaining distance he has to go is 62 - 25 = 37 miles. E is the correct answer.
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Hope this helps you.