Chapter PSS, Problem 48E

Interpretation Introduction

Interpretation:

The velocity of light after rounding off to three significant digits is to be stated.

Concept introduction:

The significant numbers are taken by counting the digits from left to right and starting by the first non-zero digit. The process of eliminating the non-significant digit is known as the rounding off. This rounding off follows three rules which are stated below as:

Rule 1: If the 1^st non-significant digit is less than $5$ then all the non-significant digits are dropped.

Rule 2: If the 1^st non-significant digit is equal to or greater than $5$ then last significant digit is increased by $1$ and dropped all the non-significant digits.

Rule 3: In a multistep calculation the non-significant digits are taken in all the steps.