Question

(5.1 x10^7)(6.1 x10^-2)
Multiply
Write using scientific notation

Answer 1

Multiply 5.1 by 6.1
then multiply this by 10^{7-2} = 10^5
then make this into scientific notation once more,
31.11 times 10^5
= 3.111 times 10^6

Answer 2

(5.1 x10^7)(6.1 x10^-2)=
(5.1)(6.1) * 10 ^ (7 -2) = 31.11 * 10 ^ 5 = 3.111 * 10^6