Steve holds the world record for the 100-meter dash. at his fastest, bolt ran 100 meters in 9.58 seconds. convert his speed into miles per hour. report your answer using 3 significant figures.
conversion factors: 1 mile = 1609 meters 60 seconds = 1 minute 60 minutes = 1 hour
use appropriate sig figs in answer!

23.4 mph

Explanation:

The conversion factors are multiplied so that the units cancel out:

(100 meters / 9.58 sec) x (1 mile / 1609 meters) x (60 sec / min) x (60 min /1 hr) = 23.4 mph

8 m/s because for him to get the same amount of energy as ray is putting out, bobby, who weighs half as much as ray, needs to run twice as fast.