Question

Which expression is correctly written in scientific notation?

A. 398 x 10^1 B. 39.8 x 10^2

C. 3.98 x 10^4 D. .398 x 10^3


Need answer ASAP

Answer 1

Answer is C :3.98x10^4

Answer 2

C. 3.98 x 10^4

Explanation:

We are only allowed one non zero digit before the decimal

A. 398 x 10^1 3 non zero digits

B. 39.8 x 10^2 2 non zero digits

C. 3.98 x 10^4 1 non zero digit

D. .398 x 10^3 0 non zero digits