Question

Which shows the expression below in simplified form?
(8×10^7)×(9×10^-4)
A. 7.2×10^3
B. 7.2×10^4
C. 7.2×10^2
D. 7.2×10^5

Answer 1

I think its A

Answer 2

8*10^(7-4)*9

Answer 3

8*10^3*9

Answer 4

72*10^3

Answer 5

A

Answer 6

Thank you xD

Answer 7

I did what you did 7- -4 = 4 9*8 = 72 ... thats where the 7.2 comes from and then 4 7.2*10^3

Answer 8

Thanks