Question

What is the product of
3.5
×
10
5
and
7.4
×
10
−
7
in the scientific notation?


1.09
×
10
−
2


1.19
×
10
−
2


25.9
×
10
−
2


2.59
×
10
−
1

Answer 1

(3.5 × 10^5)(7.4 × 10^-7) = (3.5·7.4) × 10^(5-7) = 25.9 × 10^-2 = 2.59 × 10^-1.

So the correct choice is 2.59 × 10^-1.