could someone help me with math?

Question

Find this quotient. Enter your answer in scientific notation.

0.4×10^−16/2×10^−11

Answer 1

To find the quotient for 0.4x10^-16 / 2x10^-11, first divide 0.4/2 = 2.0. Second think of 16 zeros in the numerator divided by 11 zeros in the denominator (i.e. the 11 zeros in the denominator cross out 11 zeros in the numerator) leaving 5. Third the answer is 0.000002 which is written as  2.0x10^-6 or it can be written as 0.2x10^-5.