how many times larger is 9 x 10^-8 than 3 x 10^12

To compare the size of these two numbers, we can divide 9 x 10^-8 by 3 x 10^12:

(9 x 10^-8) / (3 x 10^12)

First, let's simplify the expression by dividing the numbers and the powers of 10 separately:

(9 / 3) x (10^-8 / 10^12)
3 x (10^-8-12)
3 x 10^-20

Therefore, 9 x 10^-8 is 3 x 10^-20 times larger than 3 x 10^12.