Multiply 6.4times 10^5 by 2.5times 10^-2 and express the answer in scientific notation. 1.6times 10^-10 1.6times 10^3 16.0times 10^3 1.6times 10^4

To multiply by , we can first multiply the coefficients and then multiply the powers of 10. Therefore, the product is .To express the answer in scientific notation, we need to adjust the coefficient to be between 1 and 10. In this case, we can move the decimal point one place to the left, which gives us .So, the correct answer is .