Question

6 of 10
30:25

The mass of a housefly is 0.0000145 kilograms.

How is this number written in scientific notation?
A 1.45 x 10-5
B 1.45 x 10-4
C 1.45 x 105
D 0.145 x 10-4

Answer 1

0.0000145 = 1.45 × 10^(-5), so answer A.

Reason: move the decimal 5 places right to get 1.45, so multiply by 10^(-5).