need the answers

Problems 15 - 17 Solve 15. Bacteria is being grown in a petri dish. The number of bacteria B after t hours can be modeled by B(t) = 150e0.585t . A. What is the initial number of bacteria present? B. How many bacteria will be in the petri dish after 12 hours? 16. An archaeologist found that an artifact contained 18 grams of radioactive material. The decay model A(t) = 18e-0.000122t shows the amount of the radioactive matter, in grams, after t years. How many grams will be present after 5500 years? 17. The logistic growth function describes the population P(t) of an endangered species of 263 turtles t years after being introduced into a safe habitat area. P(t) = 1+3.62e-0.144t A) How many turtles were initially placed into the new area? B) How many turtles are expected to be in the habitat after 10 years