## anonymous one year ago a culture started with 4,000 bacteria. After 5 hours, it grew to 4,800 bacteria. Predict how many bacteria will be present after 15 hours. Round your answer to the nereast whole number. P=Ae^kt

• This Question is Open
1. anonymous

pleasee help this is the last question i have to pass the test

2. anonymous

@amistre64

3. anonymous

well 5*3=15 so do 800*3 then do 2400+4000= what @saaaaaaammmmmmmmmm

4. mathstudent55

Plug in the known info to find k in the formula. Then rewrite the equation using the value of k you found and solve for P when t = 15. A is the starting amount P is the amount at t time $$\large P = Ae^{kt}$$ $$\large 4800 = 4000e^{k \times 5}$$ Find k.

5. anonymous

Multiply 400 times 13 hours (400 bacteria every 2 hours), then add the 4000 in addition to it I got 9200 ...you have to round that though, which would be 9000 I believe.