1. The problem statement, all variables and given/known data The mass, m(t), in grams, of a tumor t weeks after it begins growing is given by m(t) = [te^t] / 80 . What is the average rate of change, in grams per week, during the fifth week of growth? a.) 2.730 b.) 3.412 c.) 6.189 d.) 6.546 e.) 11.131 2. Relevant equations The Mean Value Theorem (MVT) for Derivatives states that the average rate of change between two points is the secant line between those two points given by the equation: f ( b ) - f ( a ) / b - a 3. The attempt at a solution Since m(t) is the mass of the tumor, and we're looking for average rate of change (the slope of the secant line), we must use the MVT for derivatives. I performed the following calculation: m (5) - m(0) / 5 - 0 .... but got 1.8555.... not one of the answer choices. Is my logic wrong?