Acountry'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

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.

to determine the unit cost your would divide the total cost by the number sold.

7 bagels for $4.41       $4.41/7 = $.63 each at fresh side

5 bagels for $3.60         $3.60/5 = $.72 each at value mart