Help please

The exponential function f(x) = 48.78(1.024)" describes the population of a certain country, y, in millions, in year x. a) Substitute 0 for x and, without using a calculator, find the country's population in year 0. b) Find the country's population in year 24 as predicted by this function. A. a) 1 million; b) 90.373 million O B. a) 48.78 million; b) 88.255 million O C. a) 1.024 million, b) 84.167 million O D. a) 48.78 million; b) 86.187 million