Question

what is the solution to (3 x 10^2) (5 x 10^5) written in scientific notation?

1.5 x 10^8
15 x 10^8
1.5 x 10^7
15 x 10^7

Answer 1

$3 \times {10}^{2} \times 5 \times {10}^{5} = 15 \times {10}^{7}$