Question

Students in an English class took a final exam. They took equivalent forms of the
exam at monthly intervals thereafter. The average score S(t), in percent, after t months
was found to be given by

Answer 1

S(t)=68-20 log(t-1) \[t \ge 1\]

Answer 2

What was the average score when they initially took the test, t = 0

Answer 3

What was the average score after 14 months

Answer 4

http://www.algebra.com/algebra/homework/word/misc/Miscellaneous_Word_Problems.faq.question.439661.html

Answer 5

Almost the same question

Answer 6

Thanks 2 others though!

Answer 7

Looking for the average at 14 months!