SOLUTION: 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 a) Find the students� average score when

Question 315632: 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
a) Find the students� average score when they first
took the final exam. [12.7]
b) What would the expected average score be on a
retest after 4 months? [12.7]
S(t) = 78 - 15 LOG (t + 1)
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
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 - 15 LOG (t + 1)
a) Find the students� average score when they first
took the final exam.
---
Let t = 0 and solve for S(0)
S(0) = 78 - 15*log(0+1) = 78-15*log(1)= 78-15*0 = 78
---------------------------------------------------------
b) What would the expected average score be on a
retest after 4 months?
---
S(4) = 78-15*log(5) = 78 - 15*0.6990 = 67.52

-----------------------------------
Cheers,
Stan H.
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