[填空题]
A population of goldfish decreases /h 3xcbw+p6fw)/4vruaso*vo exponentially. The size of the pouslm /y1 5(qq.cpt;bj4zpu a s+ 6g5lb .z9ycdpulation, P, aft/1+s65pyt c5u ajl;y.b.lsbm qq4 zgzudp9c(er t days is modelled 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 =