Question

What is `6.02 * 10^23` multiplied by `9.1 * 10^-31`?

Answer 1

You multiply the numbers and add the powers of `10`

Explanation:

`=(6.02xx9.2)xx(10^(23+ -31))`
`=55.38xx10^(-8)`

To make this valid scientific notation, we'd have to move the decimal point one to the left. This means the `10`-exponent goes one up:
`=5.538xx10^(-7)~~5.5xx10^(-7)`
(rounded to 2 significant digits, as in 9.1)