A country's population in 1993 was 94 million. In 1996 it was 99 million. Estimate the population in 2012 using exponential growth. round to the nearest million ...

The rounded estimate is 111 millon or higher

Exponential growth formula is : P = Ae^kt

1999-1993 = 6

1993 = P (0) = 94 million

1996 = P (6) = 99 million

P (6) = P (0) e^ (6 k)

99 = 94 e^ (6 k)

e^ (6 k) = 99/94

6 k = ln (99/94)

k = ln (99/94) / 6 = 0.0086375

2010 - 1993 = 19

Now we have:

P (19) = 94e^ (19*0.0086375)

P19 = 110.765 million

Rounded to the nearest million = 111 million.