Question

Help......

Which of the following expressions is written in scientific notation?

A) 0.3 x 10^4
B) 2 x 10^-5
C) 10 x 10^3
D) 12 x 10^-3

Answer 1

the answer is B because the number the multiplication sign cant be less than 1 or more than 10

Answer 2

Only B The first number must have a value between 1 and 10 .  ( excluding 10)