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

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

anonymous · Answer

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

anonymous · Answer

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

anonymous · Answer

What was the average score after 14 months

anonymous · Answer

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

anonymous · Answer

Almost the same question

anonymous · Answer

Thanks 2 others though!

anonymous · Answer

Looking for the average at 14 months!