A Model for the Ability M of a Child to Memorize

Multiple Choice

A model for the ability M of a child to memorize, measured on a scale from 0 to 10, is $M = 1 + 1.6 t \ln t , 0 < t \leq 3$ where t is the child's age in years. Find the average value predicted by the model for a child's ability to memorize between second and third birthdays. Round your answer to three decimal places.

A) 5.992
B) 4.892
C) 6.792
D) 3.992
E) 4.692