Activity 1 Learning outcome: Read and solve applied problems including, but not limited to, compound interest and exponential growth and decay. Activity: Students participating in a psychology experiment on memory attended several lectures on their major area and were given an exam. Every month for a year after the exam, the students were retested to see how much of the material they remembered. The average scores for the group are given by the human memory model f(t) = 75 - 6 ln(t+1), 0 <t< 12, where t is the time in months. Find the average score on the original (t = 0) exam and the average score at the end of 3 months.