Answer:
a) 70 miles per hour
b)840 miles
Explanation:
a) to find the speed, do distance/time
b) if you do 70 miles an hour, and you want to know 12 hours, just times 70x 12
a. 70 miles per hour
b. 840 miles
280/4 = 70 miles per hour
70*12 = 840 miles
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