Question

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

Answer 1

See a solution process below:

Explanation:

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

`(2.3 xx 9.3) xx (10^-4 xx 10^8) =>`

`21.39 xx 10^(-4 + 8) =>`

`21.39 xx 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 xx 10^4 = 2.139 xx 10^5`