Question

(2.5 x 10^-10) x (1.2 x 10^18)

Answer 1

300000000

Answer 2

you can rewrite it as \[\huge (2.5 \times 1.2) \times (10^{-10} \times 10^{18})\]
is that easier?

Answer 3

Yes! I was wondering if I could combine those... thanks so much!

Answer 4

yes. it's the commutative/associative property of multiplication