Mathematics, 18.10.2019 20:10 sssssaaaaaddddd7485

A 150-pound person uses 6.7 6.7 calories per minute when walking at a speed of 4 mph. how long must a person walk at this speed to use at least 170 170 calories? a person must walk for at least nothing minutes in order to use at least 170 170 calories. (round up to the nearest minute.) enter your answer in the answer box.

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A 150-pound person uses 6.7 6.7 calories per minute when walking at a speed of 4 mph. how long must...