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) = 85 – 20 log(t +1), 0

Trigonometry (11th Edition)
11th Edition
ISBN:9780134217437
Author:Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels
Publisher:Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels
Chapter1: Trigonometric Functions
Section: Chapter Questions
Problem 1RE: 1. Give the measures of the complement and the supplement of an angle measuring 35°.
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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) = 85 – 20 log(t +1), 0 <t < 24
where t is the time in months. Round answers to at least 1 decimal point.
(a) What is the average score on the original exam?
(b) What was the average score after 6 months?
(c) What was the average score after 18 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) = 85 – 20 log(t +1), 0 <t < 24 where t is the time in months. Round answers to at least 1 decimal point. (a) What is the average score on the original exam? (b) What was the average score after 6 months? (c) What was the average score after 18 months?
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