Question

the Garibaldi family drove 400 miles in 7 hours what is the best estimate of the number of miles they drove in 1 hour

Answer 1

divide 400 by 7 and you will get 57.1428571428571 which will be about 57.1 miles

Answer 2

7 hours - 400 miles
1 hour - ___ miles

7/7 = 1
400/7 = 57.1428571
= 57 (to 2 significant figures)

Answer: 57 miles

Hope it helped :)