Concept explainers
a.
What was the average score on the original exam
a.

Answer to Problem 109E
The average score on the original exam was 80.
Explanation of Solution
Given:
Students in a mathematical class were given an exam and then tested monthly with an equivalent exam. The average scores for the class are given by human memory model
Calculation:
To find the average score on original exam, we will substitute
Therefore, the average score on the original exam was 80.
Upon graphing our given function, we will get:
We can see that at
b.
What was the average score after 2 months?
b.

Answer to Problem 109E
The average score after 2 months was 71.89.
Explanation of Solution
Given:
Students in a mathematical class were given an exam and then tested monthly with an equivalent exam. The average scores for the class are given by human memory model
Calculation:
To find the average score after 2 months, we will substitute
Therefore, the average score after 2 months was approximately 71.89.
Upon graphing our given function, we will get:
We can see that at
c.
What was the average score after 11 months?
c.

Answer to Problem 109E
The average score after 11 months was 61.65.
Explanation of Solution
Given:
Students in a mathematical class were given an exam and then tested monthly with an equivalent exam. The average scores for the class are given by human memory model
Calculation:
To find the average score after 11 months, we will substitute
Therefore, the average score after 11 months was approximately 61.65.
Upon graphing our given function, we will get:
We can see that at
Chapter 3 Solutions
PRECALCULUS W/LIMITS:GRAPH.APPROACH(HS)
- Calculus: Early TranscendentalsCalculusISBN:9781285741550Author:James StewartPublisher:Cengage LearningThomas' Calculus (14th Edition)CalculusISBN:9780134438986Author:Joel R. Hass, Christopher E. Heil, Maurice D. WeirPublisher:PEARSONCalculus: Early Transcendentals (3rd Edition)CalculusISBN:9780134763644Author:William L. Briggs, Lyle Cochran, Bernard Gillett, Eric SchulzPublisher:PEARSON
- Calculus: Early TranscendentalsCalculusISBN:9781319050740Author:Jon Rogawski, Colin Adams, Robert FranzosaPublisher:W. H. FreemanCalculus: Early Transcendental FunctionsCalculusISBN:9781337552516Author:Ron Larson, Bruce H. EdwardsPublisher:Cengage Learning





