Lux Investing
1. determine whether the function y=(5.2)^x represents exponential growth opr exponential decay.?
2. determine whether function y=7(2/3)^x represents exponential growth or decay. 3. suppose you invest 1400 dollars at an annual intrest rate of 5.5 % compounded continously , how much will you have in the account after 20 years. How much money invested at 5% compounded continiuosly for 3 years will yield 820?
Public Comments
- Generally, whenever you have the function y = ab^x, it's exponential growth when b > 1, and decay when b < 1. So, 1) is growth. 2) This is decay. 3) A = 1400*e^(.055*20) A = 4205 dollars. 4) 820 = Pe^(3*.05). P = 705.78.
- 1) Graphing the equation will answer your question. (5.30^x is growth. 2)2/3 < 1 7(2/3)^x is decay.
