i really need help : thanks

using the highest growth rate of 4.4 and beginning with the 1970 population of 584,000 calculate the population of Botswana in 2000 and project it for 2050. use the formula N=N0(zero is the bottom of the N) * e^kt. how many more Botswanas would be there have been in 2000 the abscene of AIDs? In 2050?