Identify each of the following as exponential growth or decay.
1)
2)
3)
4)
5) \(f(x)=700(0.75)^x\)
6) \(f(x)= \Large \frac{2}{3} \normalsize \cdot 4^x\)
Identify the following problems as growth or decay and then solve them.
7). The half-life of caffeine is 5.75 hours. Janine drank a cup of coffee at 7:30 am with 150 mg of caffeine, how much caffeine remains in her system at 10 am?
8). $10,000 is going to be invested. Would it be better to invest it in an account that provides interest quarterly or daily, if the interest rate is 3% over 10 years?