Which two equations below could you solve to find D, the number of days it takes the water lily population to double? 2 = 3.915 (1.106) D 7.830 = 3.915 (1.106) D 7.830 = 3.915 (2) D 2 = 1.106D

This is the concept of algebra, suppose the initial number was x, and the new number is 2x. The constant rate of growth is r and time is D, the function representing growth will be given by:

2x=x (r) D

from our choices the equations that represents the information above will be:

7.830=3.915 (1.106) D

and

7.830=3.915 (2) D

this is because from both equations we see the initial number was 3.915 and doubled to 7.830