Intermediate Algebra – Student Workbook – Second Edition 2013

Name: _____________________
Date: ________________
Lesson 3b Practice Problems
1. Convert each of the following percentages to decimals.
a) 12% = b) 112% =
c) 7% = d) 7.5% =
e) .5% = f) 200% =
2. Complete the following two tables.
Growth Rate Growth Rate Growth
as a % as a decimal Factor
13% 0.13 1.13
21%
7%
0.20
0.05
1.25
1.075
Decay Rate Decay Rate as Decay
as a % a decimal Factor
12% 0.12 0.88
23%
3%
0.18
0.02
0.75
0.98
3. Write the exponential function for each of the following.
a) Initial Value = 1500 b) Initial Value = 75
Growth Rate = 15% Decay Rate = 15%
c) Initial Value = 1250 d) Initial Value = 12
Growth Rate = 7.5% Growth Rate = 112%
e) Initial Value = 1000 f) Initial Value = 56
Decay Rate = 12% Decay Rate = 5%
g) Initial Value = 100 h) Initial Value = 57
Decay Rate = 0.5% Decay Rate = 6.2%
Scottsdale Community College Page 133 Intermediate Algebra