Mara's family is driving to her grandmothers' house. The family travels 239.4 miles between the hours of 9:10 a.m. to 1:40 p.m. Write an equation that Mara can use to determine their average rate of travel, R, rounded to the nearest mile per hour.Use the given numbers and operations to complete an equation.
Accepted Solution
A:
Answer:53.2 mphStep-by-step explanation:Mara's family travels 239.4 miles between the hours of 9:10 a.m. to 1:40 p.m.1:40 p.m. is 13:40.Thus, they traveled for13 hours 40 minutes - 9 hours 10 minutes = 4 hours 30 minutesthat is hours.Use formula:whereD = distancer = ratet = time.In your case,D = 239.4 milest = 4.5 hours