Question

Simplify the expression, using scientific notation.(9 x 10^2)(2 x 10^10) 1.1x10^21 1.1x10^13 1.8x10^21 1.8x10^13

Answer 1

(9 x 10^2)(2 x 10^10)
= 9*2 * (10^2 * 10^10)
= 18 * 10^12

can u continue?

Answer 2

no idea lost..

Answer 3

9 * 2 = 18
10^2 * 10^10 = 10^(10+2) = 10^12
you add the indices

Answer 4

yeah i understand that but 1.1x10^21, 1.1x10^13, 1.8x10^21, 1.8x10^13, ar ethe only answers

Answer 5

ok
scientific notation is defined as

N.NN.. * 10^n

Answer 6

the first number must be between 1 and 10: