Question

The population of fruit flies in a laboratory grows geometrically and is checked everyday at noon. If the population began with 80 fruit flies and reached 125 in two days, what is the population after 4 days?

Answer 1

Answer:

$\boxed{195}$

Step-by-step explanation:

The fruit flies grows geometrically.

$125=80k^2$

Find the value of k.

$\sqrt{\frac{125}{80} } =k$

$1.25=k$

$P=80(1.25)^t$

$t$ is number of days.

$P=80(1.25)^4$

$P=195$