As you know, when a course ends, students start to forget the material they have learned. One model (called the Ebbinghaus model) assumes that the rate at which a student forgets material is proportional to the difference between the material currently remembered and some positive constant, a. (a) Let y = f(t) be the fraction of the original material remembered t weeks after the course has ended. Set up a differential equation for y. Your equation will contain two constants; the constant a is less than y for all t. (b) Solve the differential equation. (c) Describe the practical meaning (in terms of the amount remembered) of the constants in the solution y = f(t).

Sunday, April 10, 2016 Art 272 Hand out #14 &15 Key Terms -Camera Obscura- Room/box sealed from light except for one small hole, which projects an upside down image on the opposite wall, allowed for tracing for large scale drawings -Silhouette- Outline of something, mostly of peopleʼs proﬁles that were cut out of black paper -Camera Lucida-Allowed artists...