Students in english class took final exam they took

Reference no: EM13470800

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, aftert 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?

b) What was the average score after 14 months?

c) After what time t was the average score 40%?

Reference no: EM13470800

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