Chapter 2, Problem 54E

Each number is supposed to be rounded to two significant figures. Correct the ones that are incorrectly rounded.

a. $1\cdot 249\times {10}^3$

to $\text{1}\cdot \text{3}\times {\text{10}}^{\text{3}}$

b. $3\cdot 999\times {10}^2$ to 40

c. 56.21 to 56.2

d. 0.009964 to 0.010