Page 306 - Basic College Mathematics with Early Integers

S E C T ION 4 .1 I INTRODUCTION TO DECIMALS 283

Rounding often occurs with money amounts. Since there are 100 cents in a dol-
1
lar, each cent is of a dollar. This means that if we want to round to the nearest
100
cent, we round to the nearest hundredth of a dollar.

Concept Check 1756.0894 rounded to the nearest ten is
a. 1756.1 b. 1760.0894 c. 1760 d. 1750

Example 18 Determining State Taxable Income PRACTICE 18
Water bills in Mexia are always
A high school teacher’s taxable income is $41,567.72. The tax tables in the
rounded to the nearest dollar.
teacher’s state use amounts rounded to the nearest dollar. Round the teacher’s in-
Round a water bill of $24.62 to
come to the nearest whole dollar.
the nearest dollar.
Solution: Rounding to the nearest whole dollar means rounding to the ones
place.
ones place 7 is greater than 5.
$41,567.72
Delete these digits.
Add 1.

Thus, the teacher’s income rounded to the nearest dollar is $41,568.
Work Practice 18

Answer
18. $25

Concept Check Answer
c