Alice and Bob are bicycle-racing, on a two-mile track. Bob rides the first mile at 50 mph, and the second mile at 71 mph. Calculate the time in minutes) that he travels the two
miles.

2.04 minutes

Explanation:

He travels the first mile at 50 mph so:

so it takes 1.2 minutes to travel each mile when going 50 miles per hour

and for the second mile he travels at 71 mph so:

(this answer is rounded)

so it takes him 0.84 minutes to travels each mile while going 71 mph.

If you ad them together his total times while biking two miles was 2.04 minutes.

explanation: in any substance/object, the particles inside it (atoms/molecules) constantly move in random directions and with random speeds (this motion is called brownian motion). as a result, the particles have some kinetic energy (which is proportional to the temperature of the substance).

explanation:

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