Question: students in a math class took a final exam. They took equivalent forms of the exam in monthly intervals thereafter. The average score S (

students in a math class took a final exam. They took equivalent forms of the exam in monthly intervals thereafter. The average score S(t), in percent, after t months was found to be given by S(t)=79-18ln(t+1), t>0. What was the average score after 7 months?

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