Question

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

Answer 1

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

Answer 2

The answers are, 7.830 = 3.915(1.106)^D and 2 = 1.106^D.

Hope this helps!