Question

HELPPPP!

i need to finish this before my parents get homeee

Answer 1

35 x 10^2




Step by step:

Answer 2

`3.5`×
`10^{3`

Explanation:

First we can expand the numbers!

• 
  `5`×
  `10^{4`
  `=50000`
• 
  `7`×
  `10^{-2`
  `=0.07`

Now multiply

• 
  `50000`×
  `0.07` =
  `3500`

Now present as standard form

• 
  `3500=3.5`×
  `10^{3`

Have a lovely day :)