the pool can be modelled by C(t) = C0e^kt, t ≥ 0. The volume of chlorine in the pool is

decreasing. Initially the volume of chlorine in the pool was 3 litres, 8 hours later the

volume was 2.5 litres.

b Find the exact value of k.

i tried to work this question out but it do not turned out to be right.

i used C(t)=3e^kt

where c(t)=3

then there is another equation C(t)=2.5e^8t

then i used simultanoeus equation

is this method correct?

thank you