Question

Which of the following correctly expresses 0.0000004 in scientific notation? A 4 × 107 B 4 x 10-7 C 0.4 × 106 D 0.4 x 10-6​

Answer 1

B

Step-by-step explanation:

0.0000004*10^1=0.000004

0.000004*10^2=0.0004

0.0004=0.0000004*10^3

0.0004*10^3=0.4

0.4=0.0000004*10^6

4=0.4*10

4=0.0000004*10*10^6

4=0.0000004*10^7

0.0000004=4*10^-7