A Person Learns a New Task at a Rate That

Multiple Choice

A person learns a new task at a rate that is proportional to the percentage of the task not yet learned. Let p represent the percentage of the task already learned at time t (in hours) . If a person begins learning at a rate of 39 percent per hour, estimate the percentage of the task that will be learned in 2 hours using Euler's method with a step size of 0.5. Round your answer to one decimal place.

A) 58.0 %
B) 66.8 %
C) 64.8 %
D) 49.4 %
E) 66.3 %