Posted by **selina** on Tuesday, May 11, 2010 at 5:01pm.

students in a biology class just took a final exam. a formula for predicting the average exam grade on a similar test t months later is.

s(t)=78-15log(t+1)

(a)find the students average score when they first took the final exam.

(b)what would be the expected average score be on a retest after 4 months.

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