Question

3 Which pairs of numbers in scientific notation show one number that is about

20 times as great as the other number?

Choose all that apply.

A

B

C

D

E

2.01 X 10' and 4.25 X 106

5.97 X 104 and 3.12 X 103

4.91 X 106 and 5.09 X 103

8.21 X 10-3 and 4.13 x 10-4

2.94 x 10-8 and 6.22 x 10-7

Answer 1

Answer:

$8.21\times 10^{-3}\text{ and }4.13\times 10^{-4}$

Step-by-step explanation:

Since,

$\frac{4.25\times 10^6}{2.01\times 10^1}=211442.78607\approx 211443$

$\frac{5.97\times 10^4}{3.12\times 10^3}=19.1346153846\approx 19$

$\frac{4.91\times 10^6}{5.09\times 10^3}=9365.4033\approx 9365$

$\frac{8.21\times 10^{-3}}{4.13\times 10^{-4}}=19.8789\approx 20$

$\frac{6.22 \times 10^{-7}}{2.94\times 10^{-8}}=21.156462585\approx 21$

Note : In every option we put greater number as numerator because 20 > 1.

If we take denominator greater than we can not obtained a number greater than 1.