[填空题]
A population of goldfish decreases evlvc 9i2e7napk44wn b *:dqv7 xponentially. The size of the populatir 6nz9oct j,5ion, P, after t days is modellztnij 6o5r c9,ed by the function
P(t)=8000$\times2^{-t}$+100,t≥0.1.Write down the exact size of the initial population. P =
2.Find the size of the population after 5 days. P =
3.Calculate the time it will take for the size of the population to decrease to 120.
The population will stabilize when it reaches a size of n. t = days
4.Write down the value of n. n =