# Which of the following expressions is written in scientific notation?

## (a) 14.3 × 10^{5} (b) 0.07 × 10^{7} (c) 4.1 × 10^{-5}

In the following, let ius identify which expressions is written in scientific notation.

## Answer: (b) 0.07 × 10^{7} (c) 4.1 × 10^{-5}

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

**Explanation:**

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 × 10^{7} (c) 4.1 × 10^{-5}

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