Students in a mathematics class were given an exam and then retested monthly with equivalent exams. The average score S (on a 100-point scale) for the class can be modeled by S = 80 – 14ln(t + 1), 0

Calculus: Early Transcendentals
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Chapter1: Functions And Models
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Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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3. Students in a mathematics class were given an exam and then retested monthly with
equivalent exams. The average score S (on a 100-point scale) for the class can be
modeled by S = 80 – 14ln(t + 1), 0 <t < 12, where t is the time in months.
a. What was the average score on the original exam?
b. What was the average score after 4 months?
c. After how many months was the average score 46?
Transcribed Image Text:3. Students in a mathematics class were given an exam and then retested monthly with equivalent exams. The average score S (on a 100-point scale) for the class can be modeled by S = 80 – 14ln(t + 1), 0 <t < 12, where t is the time in months. a. What was the average score on the original exam? b. What was the average score after 4 months? c. After how many months was the average score 46?
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