This document is from an algebra library and discusses applications of integers in pre-algebra concepts. It provides 3 practice problems asking about temperature differences, submarine depths, and volcano heights and smoke plumes. The answer key then gives the solutions to each problem as 37°F, 1200 ft, and 11,000 ft respectively.

1. Algebra
Library
Chapter 1: Pre-Algebra Concepts
Lesson 1.7: Applications of Integers
Practice
1. In winter the average
high and low
temperatures are as
shown here. How much
of a temperature
difference is there?
2. A submarine descends
to a depth of 1500 ft
and stays at that depth
for several hours. Then
it descends to a depth
of 2700 ft. How much
farther did it descend?
3. This volcano is 11,000
ft tall and it sends a
plume of smoke to an
altitude of 22,000 ft.
How tall is the plume
of smoke?
1

2. Algebra
Library
Chapter 1: Pre-Algebra Concepts
Lesson 1.7: Applications of Integers
Answer Key
1. 37°F
2. 1200 ft
3. 11,000 ft
2