Question

What is (3.1x10^5)(2.2x10^7) in scientific notation?

Answer 1

The scientific notation:

$a\cdot 10^k$ where $1\leq a < 10$ and $k\in\mathbb{Z}$

$(3.1\cdot10^5)(2.2\cdot10^7)=(3.1)(2.2)(10^5\cdot10^7)\\\\=6.82\cdot10^{5+7}=6.82\cdot10^{12}$

Answer 2

Answer:

It's B.) 6.82 x 10^12