Question

Need some help, ​please.

Answer 1

Question 3 ⇒ 6.5 x $10^{7}$

If you move the decimal point in 6.5 seven spaces to the right you would get the number 65,000,000.

Question 4 ⇒ 3.99 x $10^{-6}$

4.4 x $10^{-5}$ = 0.000044

3.99 x $10^{6}$ = 0.00000399

2.6 x $10^{2}$ = 260

1.85 x $10^{3}$ = 1850

Question 5 ⇒ 0.0072

If you move the decimal point of 7.2 three spaces to the left. Your answer would be 0.0072, the third choice.

Question 6 ⇒ $10^{6}$

To get the answer to this problem you would count how many decimal places it would take to get your decimal point after 1, which would be 7. But, you want your exponent to be to the power of 10 not 1, so you would simply subtract 1 from 7 (7-1) which would give you 6. So your answer is $10^{6}$.