Question

A scale has a percent error of 7%. The scale reads the mass of a book as 450 g.

Which statement describes what the actual mass of the book could be?

Answer 1

The actual mass is either 453 or 447

Explanation:

7 percent of 450

= (7/100) * 45

= 3.15

error = 3.15 g

hence actual mass

= 450 + 3.15

= 453.15

or

= 450 - 3.15

= 446.85