Question

How do you simplify `(6 times 10^8)(7 times 10^-12)`?

Answer 1

`=4.2xx10^-3`

Explanation:

`(6xx10^8)(7xx10^-12)`

The key to this problem is realizing that every term multiplies and order doesn't matter.
`=6xx7xx10^8xx10^-12`
`=42xx10^(10-12)` (exponent addition rule)
`=42xx10^-2`
`=4.2xx10^-3`