Algebra Compounding Interest Counting Exercise Help

show all work. Please check accuracy to make sure answers are correct

Ans
Ans.-31.82
8. Students in a College Algebra class were given a final exam in May and
subsequently retested monthly with an equivalent exam. The average
score (R) for the class is given by the human memory model
X-86-15log(t 41)
where t is the time in months after the final exam. What is the average
score 5 months after the final exam? Give your answer correct to the
nearest hundreth
Ans.
100 Grupos
2100*420-30
3. How much money should be invested at a rate of 6% compounded
continuously to produce an amount of $20,000 in 15 years?
Ans.
4. A certain population increases according to the model P(t) = 250e0.47
with t = 0 corresponding to 1995. Use the model to determine the
population in the year 2003. Round your answer to the nearest integer
Ans
ER
32381
xa