What Is the Correct Answer to the Following Expression?
6 $\times$

Multiple Choice

What is the correct answer to the following expression?
6.38 $\times$ 10^-10 + 1.65 $\times$ 10^-12

A) 6.3965 $\times$ 10^-10
B) 6.397 $\times$ 10^-10
C) 6 $\times$ 10^-10
D) 6.4 $\times$ 10^-10
E) 6.40 $\times$ 10^-10