Chapter 1 - Problem Solving and Critical Thinking - 1.2 Estimation, Graphs, and Mathematical Models - Exercise Set 1.2 - Page 26: 24

Rounded: 59 Actual: 59.22

The estimated cost of the six grocery items is obtained by rounding of the values, 4 + 8 + 29 + 4 + 13 + 1 = 59 Actual cost of the six grocery items = 59.22 It is a reasonable estimate when comparing to the actual value, only a $.22 difference.