# How do you simplify (9 times 10^7)(7 times 10^9) and write the answer in scientific notation?

Jan 30, 2016

here is how

#### Explanation:

$\left(9 \times {10}^{7}\right) \left(7 \times {10}^{9}\right)$

$= 63 \times {10}^{7} \times {10}^{9}$

$= 6.3 \times 10 \times {10}^{16}$

$= 6.3 \times {10}^{17}$