physics
posted by HELP ASAP .
An athlete prepares for practice by walking 820 m in 10.3 min and sprinting 600 m in 3.8 min. Determine the athlete's average speed in metres per second.

physics 
Damon
distance = 820 + 600
time = 10.3 * 60 + 3.8 * 60
average speed = distance / time
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