[填空题]
A population of goldfish decreases exponentially.d2 6o-bkjp1tceiy u-l+k35hw /nvru0 The size(tt bi/x*0qw o of the population, P, after t days t/w*bq to0 (xiis 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 =