This site uses flash for videos. If you're having trouble enabling it, click on the information icon in the address bar to change your settings to allow Flash.

# Exponential Growth (Doubling Time) $A_{t}=A_{0}(2)^{\frac{t}{d}}$

1. 1
Use the equation $A_{t}=A_{0}(2)^{\frac{t}{d}}$ to solve.  If you start with 3 bacteria and the bacterial colony doubles its population every 2 hours, what will the population be after 8 hours?
2. 2
Use the equation $A_{t}=A_{0}(2)^{\frac{t}{d}}$ to solve.  If you start with 50 bacteria and the bacterial colony doubles its population every 30 minutes, what will the population be after 4 hours?
3. 3
Use the equation $A_{t}=A_{0}(2)^{\frac{t}{d}}$ to solve.  If you start with 100 bacteria and the bacterial colony doubles its population every 20 minutes, what will the population be after 3 hours?
4. 4
Use the equation $A_{t}=A_{0}(2)^{\frac{t}{d}}$ to solve.  If you start with 5 bacteria and the bacterial colony doubles its population every hour, how long will it take to reach a population of 2560?
5. 5
Use the equation $A_{t}=A_{0}(2)^{\frac{t}{d}}$ to solve.  If you start with 10 bacteria and the bacterial colony doubles its population every 25 minutes, how long will it take to reach a population of 320?
6. 6
Use the equation $A_{t}=A_{0}(2)^{\frac{t}{d}}$ to solve.  If you start with 120 bacteria and the bacterial colony reaches a population of 7680 in 24 minutes, what is the doubling time for the colony?
7. 7
Use the equation $A_{t}=A_{0}(2)^{\frac{t}{d}}$ to solve.  If you start with 70 bacteria and the bacterial colony reaches a population of 143360 in 22 hours, what is the doubling time for the colony?
8. 8
Use the equation $A_{t}=A_{0}(2)^{\frac{t}{d}}$ to solve.  If you start with 35 bacteria and the bacterial colony reaches a population of 8960 in 32 minutes, what is the doubling time for the colony?

$$e=mc^2$$