Question

A giraffe can run up to 46.93 feet per second. How far could a giraffe run in 1.8 seconds?

Answer 1

46.93 ft/sec * 1.8 sec = 84 ft

Explanation:

The reason you can use simple multiplication is because of the units:

`46.93 (ft)/sec) * 1.8 sec` would equal `84.474 (ft*sec)/sec`,

however the seconds cancel out, leaving you with just the distance traveled.

The reason the answer is 84 instead of 84.474 is because the number 1.8 only contains two significant figures.