Question

(6.4 x 10^7) ÷ (1.6 x 10^3)

Answer 1

(6.4 x 10^7) 6.4
----------- = ---- x 10^7-3 = 4 x 10^4 or 40,000
(1.6 x 10^3) 1.6

Answer 2

i dont get how we cn know n=how to either add or subtract.

Answer 3

when it is of the form a^m * a^n then u add to get a ^m+n

a^m
when it is of the form ----- then u subtract to get a ^m-n
a^n