The cost of a holiday is £2400 Rana pays a deposit followed by monthly payments, in the ratio
deposit : total of the monthly payments = 3:5

She makes 6 equal monthly payments. Work out her monthly payment

David estimated he had about 20 fish in his pond. a year later, there were about 1.5 times as many fish. the year after that, the number of fish increased by a factor of 1.5 again. the number of fish is modeled by f(x)=20(1.5)^x. create a question you could ask that could be answered only by graphing or using a logarithm.