The world's population¹ is about f(t) = 6.91e^0.011t billion, where t is time in years since 2010. Find f(0), f ' (0), f(8), and f ' (8). Using units, interpret your answers in terms of population.

Round your answers for f(0) and f(8)  to three decimal places. Round your answers for f ' (0)  and f ' (8) to four decimal places. Enter the rates after the drop-down menus as positive values.

f(0) = _______ means (3 choices: the population was growing at a rate of, the population was decreasing at a rate of, the population was) _________ (2 choices: billion, billion people per year) in the year _________

f ' (0) = _______ means (3 choices: the population was growing at a rate of, the population was decreasing at a rate of, the population was) _________ (2 choices: billion, billion people per year) in the year _________

f(8) = _______ means (3 choices: the population will be growing at a rate of, the population will be decreasing at a rate of, the population will be) ________ (2 choices: billion, billion people per year) in the year _________

f ' (8) = _______ means (3 choices: the population will be growing at a rate of, the population will be decreasing at a rate of, the population will be) ________ (2 choices: billion, billion people per year) in the year _________