Complete the table (Was in a table form!)

Question

Scientific Notion /// Standard Notion
1. ________________ = 62,000,000
2. -3.05*10^6 = ___________
3. ________________ = .00000089

Simplify
4. (9.8*10^2) * (5*9*10^7)
5. (7.2*10^-5) / (4.3*10-3)

My Answers:-
1. 6.2*10^7
2. -3,050,000
3. 8.9*10^-7
4. 5.782*10^9
5. I rally don't understand this one!!

Plzz help me fast!!

Answer 1

correct on the first four.

On the fifth, do the exponents first

7.2/4.3 x E (-5+3)
then the division
1.7E-2 or in standard .017

Answer 2

i still didn't understand what u wrote for 5!