Question

How do I solve this to, my teacher gave me this work and still don't understand most of it.

Answer 1

A

Explanation:

using the rule of exponents

`(a^(m) )/(a^(n) )` =
`a^((m-n))`

to find how many times larger 9 ×
`10^(7)` is than 3 × 10³, divide , that is

(9 ×
`10^(7)` ) ÷ (3 × 10³)

=
`(9)/(3)` ×
`(10^7)/(10^3)`

= 3 ×
`10^((7-3))`

= 3 ×
`10^(4)`