A car is traveling at 60 mph. If the rate of speed increases 4 mph each hour,

A car is traveling at 60 mph. If the rate of speed increases 4 mph each hour,
how long will it be before the car is traveling at a rate of 80 mph?

A) 4 hours
B) 5 hours
C) 6 hours
D 7 hours​

Answer: The correct answer is 5 hours

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