Growth and Decay 










Even Better Things Are Coming...
But for now try the problems below.
Quick review: When you have the differential equation y'=ky, the general solution is always of the form y(t) = Ae^{kt}. 
Sample problems: 1. If y'=2y, find the general solution. 2. If y'=5y, and y(0)=12, find the particular solution. 3. If y'= y/3, and y'(0)=9, find the particular solution. 4. If f '(t) = 4 f(t), and f(3) = 15, what is f(2)? 5. If m'(t) = .02 m(t), where m(t) is the mass of bacteria t hours after noon on July 10, 2003, how long will it take for the mass to double? What day and time? 
Here is something that I am now working on which runs on your installation of Excel: Excel Graphs
Word Problems:
1. Ever wonder why there are rabbits on the cover of your math book? (Click on "MagicBlueCube" to find out.)
By
Lee DeAnda
Ó 2003 All rights reserved.