What is 0.00000025 expressed in scientific notation?

Question

A. 2.5 x 10^-8

B. 2.5 x 10^-7

C. 2.5 x 10^-7

D. 2.5 x 10^8

Answer 1

To express 0.00000025 in scientific notation, you need to move the decimal point to the right until you have a number between 1 and 10.

Moving the decimal point 8 places to the right gives:

0.00000025 = 2.5 x 10^-8

So the correct answer is:

A. 2.5 x 10^-8