# How do you write the answer in scientific notation given (2.3times10^-4)(9.3times10^8)?

Aug 26, 2017

See a solution process below:

#### Explanation:

First, let's rewrite and evaluate the expression as:

$\left(2.3 \times 9.3\right) \times \left({10}^{-} 4 \times {10}^{8}\right) \implies$

$21.39 \times {10}^{- 4 + 8} \implies$

$21.39 \times {10}^{4}$

Now, to write the expression in scientific notation we must move the decimal point 1 place to the left so we must add $1$ to the 10s exponent:

$21.39 \times {10}^{4} = 2.139 \times {10}^{5}$