[填空题]
A population of goldfish depg 6k 4 k; fzb:hu4av-w(yo v:btxj fwok4;(t.creases exponentially. The size pr x7k8f ag53aof the population, P, after t days is modelled by the funcgkx78ap fa35 rtion
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 =