Question

(Multiplying and Dividing with Scientific Notation MC)

How many times smaller is 5 x 10-7 than 8.5 x 10-4? I NEED THIS ASAP

Answer 1

38

Explanation:

5 x 10 -7= 43

8.5 x 10 -4= 81

81-43= 38

Answer 2

`1.7 * 10^3 = 1700`

Explanation:

To find how many times x is smaller than y, divide y by x.

Here we want to find how many times 5 × 10^-7 is smaller than 8.5 × 10^-4, so we divide 8.5 × 10^-4 by 5 × 10^-7.

`(8.5 * 10^(-4))/(5 * 10^(-7)) =`

`= (8.5)/(5) * (10^(-4))/(10^(-7))`

`= 1.7 * 10^(-4 - (-7))`

`= 1.7 * 10^(-4 + 7)`

`= 1.7 * 10^3 = 1700`