Which of the following correctly shows 0.000000027 in scientific notation? 2.7 C 2.7times 10^-8 2.7times 10^8 0.27times 10^-8

To express 0.000000027 in scientific notation, we need to move the decimal point to the right until we have a number between 1 and 10. In this case, we need to move the decimal point 8 places to the right to get 2.7. Since we moved the decimal point to the right, the exponent will be negative. Therefore, the correct answer is C $2.7\times 10^{-8}$.