Suppose You Estimate the Sample Regression Function $$Midt\widehat {erm ~Sc}ore = 62.33 + 4.62 \cdot \text { Time Taken } - 0.038 \cdot \text { Time Taken } { } ^ { 2 }$$

Multiple Choice

Suppose you estimate the sample regression function $$Midt\widehat {erm ~Sc}ore = 62.33 + 4.62 \cdot \text { Time Taken } - 0.038 \cdot \text { Time Taken } { } ^ { 2 }$$
You should conclude that the marginal effect of time taken on midterm score reaches its maximum at _____ minutes taken.

A) 62.33
B) 60.79
C) 121.58
D) 4.582