Learning thoery students in a mathmatics class were given an exam and than retested monthly with equivalent exams. the average score s (on a 100-point scale) for the class can be modeled by s = 80 - 14 in(t + 1),0 ≤ t ≤ 12, where t is the time in months.
(a) what was the average score on the orignal exam?
(b) what was the average score after 4 month?
(c) after how many months was the average score 46?