Concept explainers
The number of bacteria in a culture quadruples every hour. There were 65,536 bacteria in the culture at 8: 00 A.M. The expression
a. What is the value of the expression for
b. What does the value of the expression in part a represent?
To determine the value of a given expression at a given value and state its significance.
Answer to Problem 7STP
1024 ; it is the number of bacteria present at 4:00 AM
Explanation of Solution
Given: Number of bacteria at 8:00 AM is given which is 65536. The expression to model number of bacteria present h hours after 8:00 PM is given. The expression is
Calculation:
At h = -4
It represents the number of bacteria 4 hours before 8:00 AM. It means, it represents the number of bacteria present at 4:00 AM.
Chapter 7 Solutions
High School Math 2012 Common-core Algebra 1 Practice And Problem Solvingworkbook Grade 8/9
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