A culture started with 6,000 bacteria. After 3 hours, It grew to 7,200 bacteria. Predict how many bacteria will be present after 19 hours. Round your answer to the nearest whole number.

Question

anonymous · Answer

what is $7200\div 6000$ ?

anonymous · Answer

N(t) = No exp(kt)

k t = ln[N(t)/No]

use known values at t=3 to get k
 from which you can then substitute 
t=19 and get answer.

anonymous · Answer

oh it is not nearly that complicated
lets use only the numbers you see

anonymous · Answer

$$7200\div 6000=\frac{6}{5}=1.2$$ so you can use 
$$6000\times (1.2)^{\frac{t}{3}}$$ as a model

anonymous · Answer

you want the value when $t=19$ whip out a calculator and compute 
$$6000\times (1.2)^{\frac{19}{3}}$$

anonymous · Answer

What is the starting equation in your approach, @satellite73 ?