Michael is going to the store 6 miles away. He rides his bike at 12 mph for the first half of the trip, then walks at 4 mph for the remainder
Michael's average speed for the trip to the store is closest to:
1.2 mph
2.4 mph
3.6 mph
4.8 mph
5.10 mph
6.12 mph
7.14 mph
8.exactly halfway between two of the values above
9.impossible to determine
3,4,9
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