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.
Practise Edexcel GCSE Maths Iteration with exam-style questions for Foundation and Higher tier. 40 questions, matched to the Edexcel GCSE Maths (1MA1) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.