What is 0.000000800 in scientific notation?

Answer 1

8.0 x 10-7

To write this in standard form we need to have one digit (not a 0) in front of the decimal point. We can do this here by moving the decimal point 7 places to the right. As we are moving the decimal point 7 places to the right we are making the number 107 times as large. Therefore we need to multiply by 10-7 to get back to the original number.