precalculus II I do not understand this question

12) The size of a population P, of frogs, t years after it has been introduced into a wetland is given by 1000 P(t) = 1 + 49 (2 a) How many frogs were initially introduced into the wetland? Show set up before punching into your calculator. Include proper units (of measure) in your answer. b) Use a graphing device to approximate how long it takes for the population to reach 750. Sketch a graph(s) to justify your answer and include units (of measure) in your answer. Extra Credit: Justify your answer algebraically (no use of graphs) on the last page of this test. c) What is the maximum number of frogs that the wetland can support? Show how you can tell this from the graph you sketched in part b above