Question

3. 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.
What was the average score when they initially took the test, t = 0?
Round your answer to a whole percent, if necessary.
a)
Answer:
What was the average score after 4 months? after 24 months?
Round your answers to two decimal places
After what time t was the average score 50%?
Round your answers to two decimal places