Question

Express in scientific notation. Make sure your answer has the same number of significant figures as the starting value.

(1.8 x 10-2) ÷ (9 x 102) = _____



2 x 10-5

2.0 x 10-5

0.2 x 10-4

Answer 1

1.8*10^-2/9*10^2 = 0.2*10^-4 = 2.0*10^-5

Answer 2

2x10-5