Question

Which numbers are greater than 3 × 10^−7?

Choose all answers that are correct.

A.
9 × 10^−9

B.
2 × 10^−5

C.
6 × 10^−7

D.
5 × 10^−8

E.
2 × 10^−7

Answer 1

one way to do this
all single digits so look at the exponent. the higher the negative number the smaller the value example 10^-9 will be less than 10^-7. example 10^-5 is greater than 10^-7. rewrite all the choices as a number multiplied by 10^-7 and check which ones are > 3.

Answer 2

I got B and C