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

Question

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

anonymous · Answer

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

anonymous · Answer

@amistre64

anonymous · Answer

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

mathstudent55 · Answer

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.

anonymous · Answer

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.