Students in a fifth-grade class were given an exam. During the next 2 years, the same students were retested several times. The average score was given by the model f(t) = 83 – 27 log(t + 1), 0

Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter6: Vector Spaces
Section6.7: Applications
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Students in a fifth-grade class were given an exam. During the next 2 years, the same students were
retested several times. The average Score was given by the model
f(t) = 83 – 27 log(t + 1), 0 st< 24
where t is the time in months. Round answers to 1 decimal place.
(a) What is the average score on the original exam?
(b) What was the average score after 5 months?
(c) After how many months does the average score drop below 56?
months
Transcribed Image Text:Students in a fifth-grade class were given an exam. During the next 2 years, the same students were retested several times. The average Score was given by the model f(t) = 83 – 27 log(t + 1), 0 st< 24 where t is the time in months. Round answers to 1 decimal place. (a) What is the average score on the original exam? (b) What was the average score after 5 months? (c) After how many months does the average score drop below 56? months
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