45 minutes is half of an hour and 30 minutes
2 is the y -4 is the x I believe that this is the answer
P = A(1+r)^x
where P is the population at time x
A is the initial population and r is the growth/decay rate. Growth will be +positive r number added to the 1. Where as decay subtracts r. So any answers that are > than 1 which is answers A and B.