Concept explainers
a.
To find time of bacteria value 400.
a.
Answer to Problem 17CT
10 hours
Explanation of Solution
Given information:
Type A bacteria,
Calculation:
From given equation,
Type A bacteria= 400
Substituting value,
Solving,
Factorizing,
Taking common out,
So,
For equation to be 0,
As time cannot be in negative,
Hence, it will take 10 hours for bacteria to reach 400
b.
To find the type A and type B bacteria same
b.
Answer to Problem 17CT
8 hours
Explanation of Solution
Given information:
Calculation:
According to question,
Type A= Type B
Substituting values,
Solving,
Like terms being added,
Solving,
Taking common out,
Again,
For equation to be 0,
So, as number of bacteria cannot be negative,
Hence, in 8 hours, bacteria will be equal for both types.
a.
To find when type A bacteria is more than type B bacteria and vice versa
a.
Explanation of Solution
Given information:
Type A:
Type B:
Graph:
Interpretation:
Observing the graph,
Type B is more in the starting 8 hours. But after 8 hours, the type A bacteria increased more than Type B.
Chapter 9 Solutions
Big Ideas Math A Bridge To Success Algebra 1: Student Edition 2015
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