The number of bacteria in a culture t t\,t hours from now is Pt P_t\,Pt where
P0=500 P_0 = 500 P0=500 Pt+1=1.2(Pt−50) P_{t+1} = 1.2(P_t - 50) Pt+1=1.2(Pt−50)Work out the number of bacteria in the culture 3 hours from now.
124 exam-style questions on Eduqas GCSE Maths Iteration. Each one has a worked solution and a mark scheme showing where the marks go.