Chapter 1.5, Problem 2CP

Which of the following is the sum of the following numbers to the correct number of significant figures?

$3.115+0.2281+712.5+45=$

$\begin{array}{l}\text{a)}\hfill \\ \text{760}\text{.8431}\hfill \\ \text{b)}\hfill \\ \text{760}\text{.843}\hfill \\ \text{c)}\hfill \\ \text{760}\text{.84}\hfill \\ \text{d)}\hfill \\ \text{760}\text{.8}\hfill \\ \text{e)}\hfill \\ \text{761}\hfill \end{array}$