Question

What is the product written in scientific notation? (5.91×10^−3)⋅(8.7×10^10)

a) 14.61 × 10^−30

b) 5.1417 × 10^8

c) 14.61 × 10^7

d) 5.1417 × 10^7

Answer 1

It's b I know I have it right because I put it into my calculator

Answer 2

(5.91 * 10^-3) * (8.7 * 10^10) =
(5.91 * 8.7) * (10^-3 * 10^10) =
51.417 * 10^7.....which is the same as  5.1417 * 10^8