Recent content by hongyuan94

sorry, I can't really understand it. What means proportional to C here? I thought that b is the growth rate so b multiply with t would be the growth then minus 20 would be the after-culling growth rate.

take from part (a) b is the growth rate, so dC/dt = bt-20 ?

Part (b) we use the formula from (a) $$P(t)=500\left(\frac{11}{10}\right)^{\frac{t}{2}}$$, for year 2005 t=0, so P(0) = 500, next is year 2006 where 20 deer are culled every year, so we use the term -20t then substitute in the formula we have P(1) = 500 e^-20

a) On January 1 2000, the park estimated that they had 500 deer on their land. Two years later, they estimated that there were 550 deer on the land. Assume that the number of deer was changing exponentially, i.e. P(t)=ae^bt where P is the number of deer at year t, and a and b are parameters.Find...