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

a. 1.5 x 10^8
b. 15 x 10^8
c. 1.5 x 10^7
d. 15 x 10^7 ***??

Thank you for the one last time. I appreciate it. :)

2 answers

No, number between 1 and ten

15 * 10^7 = 1.5 * 10^8
Consider what the answer to the question is, which is 150,000,000. It has 7 zeros and thus the answer has to equal 150 million. C is correct as D makes it 1.5 BILLION, too much, so C makes it 150 million which is the same as the starting question.