Which of the following expressions is written in scientific notation?
(a) 14.3 × 10⁵      (b) 0.07 × 10⁷      (c) 4.1 × 10^-5

Solution:

Scientific notation is just a way of expressing a very large number in a decimal form.

The whole part of the decimal number should lie between 1 and 10 and the exponent part shows how many places to move the decimal point. 

(a) 14.3 does not lie between 1 and 10. So, this is not in scientific notation.

(b) 0.07 lie between 1 and 10. So, this is in scientific notation.

(c) 4.1 lie between 1 and 10. So, this is in scientific notation.

Therefore, the following expressions is written in scientific notation (b) 0.07 × 10⁷     (c) 4.1 × 10^-5

Which of the following expressions is written in scientific notation?

Summary:

(b) 0.07 × 10⁷ (c) 4.1 × 10^-5