The length and width of a standard sheet of paper is measured,and then the area is found by calculation to be 93.500 in².The number of significant figures in the width measurement must be at least: A) 5 B) 4 C) 3 D) 2

Question

Quizplus · Accepted Answer

The area is given to 5 significant figures, so the product of the length and width must also have 5 significant figures. Since the length is given to 3 significant figures, the width must have at least 5 - 3 = 2 significant figures.

The Length and Width of a Standard Sheet of Paper