SOLUTION: I am in college algebra and here is the question I am stuck on, I know when I plug the equation in my calculator for part a) I get 68 but I don't know how to actually solve the pro

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Question 867580: I am in college algebra and here is the question I am stuck on, I know when I plug the equation in my calculator for part a) I get 68 but I don't know how to actually solve the problem. Can you please help explain how to solve this problem.
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
S(t) = 68 − 20 log (t + 1), t ≥ 0.
a) What was the average score when they initially took the test, t = 0?
Answer:
Show your work in this space:
b) What was the average score after 14 months?
Answer:
Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
You simply substitute the given value for t and compute. Nothing more to know. You could use the caclulator for the logarithm value.

Really, just do the substitution and go from there.
(a)
S%280%29=68-20%2Alog%28%280%2B1%29%29
(b)
Now you use t=14.