Practice: How many sig figs does each number contain?

a) 100. min

b) 17.3 x 10^{3} mL

c) 10 apples

The number of **Significant Figures** for a value affects its precision.

Concept #1: Exact vs Inexact Numbers

Example #1: Determine if the following statement deals with an exact or inexact number: The combined mass of all doses of a bronchodilator administered to a patient measure 10.0 mg.

Concept #2: Rules for Significant Figures

Example #2: Determine the number of significant figures in the following value: 0.003840

Practice: How many sig figs does each number contain?

a) 100. min

b) 17.3 x 10^{3} mL

c) 10 apples

Practice: Indicate the number of significant figures in the following:

A liter is equivalent to 1.059 qt.