Concept explainers
(a)
Find the percent of increase in the area.
(a)
Answer to Problem 41PPE
21%
Explanation of Solution
Given :
The sides of a square that measures 4 m by 4 m increased in length by 10%.
Calculation:
Area formula :
Side = s = 4 m
Measured area of square =
The side is increased by 10% , so increased height =
New area of square =
So, percent increase =
(b)
Find the percent of increase in the area.
(b)
Answer to Problem 41PPE
21%
Explanation of Solution
Given :
The sides of a square that measures 6 m by 6 m increased in length by 10%.
Calculation:
Area formula :
Side = s = 6 m
Measured area of square =
The side is increased by 10% , so increased height =
New area of square =
So, percent increase =
(c)
Predict the percent of increase in the area.
(c)
Answer to Problem 41PPE
21%
Explanation of Solution
Given :
The sides of a square that measures 8 m by 8 m increased in length by 10%.
Calculation:
Let the original length be 100
So, area =
It is increased by 10% , so new length is =
So, new area =
So, percent increase =
We calculate in this way, since it makes the calculation easy.
Chapter 2 Solutions
High School Math 2015 Common Core Algebra 1 Student Edition Grade 8/9
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