To express the given number in the form of a x 10^n, we need to move the decimal point 9 places to the left, since the number is less than 1. Therefore, the correct answer is:
B. 3 x 10^-9
Roughly it takes light less than 0.000000003 of a second to travel a one-meter distance express this number in the form of a x 10^n where 1 < a < 10 and is a one-digit number
A. 3 x 10^-8
B. 3 x 10^-9
C. 3 x 10^9
D. 3 x 10^8
1 answer