Question

Which of the following would be a reasonable estimate for the weight of a pencil?

A. 1 × 10^-20 lb
B. 1 × 10^20 lb
C. 1 × 10^2 lb
D. 1 × 10^-2 lb

Answer 1

D

Explanation:

Let's start by ruling out answers. B and C are way too much, as C is the weight of a teenager, and B is WAY too heavy to even comprehend.

Because 10^20 or 10^-20 are very small amounts, we can also rule A out to get that the answer is D.