Compute and write your answer in scientific notation.

(4.3x10-8thpwr)(1.5x10 9thpwr)

(4.3x1.5) x 10^(-8+9)

now just collapse the products

5.5x10^-3

To multiply numbers in scientific notation, you need to multiply the coefficients and add the exponents.

First, let's multiply the coefficients:
4.3 x 1.5 = 6.45

Next, let's add the exponents:
-8th power + 9th power = 1st power

Therefore, the result in scientific notation is 6.45 x 10^1.