Answer:
Its B
Step-by-step explanation:
Answer: Hello there!
A model to see the growth of a certain population is the exponential model.
If the initial population is P, then the model can be written as
Where t is the time, and r is growth rate.
and f(0) = P
Then we want to know the time needed for the initial population to be doubled, this is f(x) = 2P, where x is the time that we want to find.
then
then x= ln(2)/r
Answer:
42 cubic cm
Step-by-step explanation:
<span>x^2 - (7 + 2x) = 0
x^2 - 2x - 7 = 0
Solve this using the quadratic equation, only the positive solution is wanted</span>