[填空题]
A population of gold4alzc a1k700tz5 lsnh j9wo 2b,j 8z5ixs59ofk70i1xxc io jx5p:ln lfish decreases exponentially. The size of the population, P, after t days is modelled by then 755fo5x,1i s xxxjkl:9i ojilc08zp 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 =