The formula for exponential population growth is:

Step-by-step solution

Exponential growth form can be represented mathematically by the following exponential equation: d N d t =( B - D ) N B = Birth rate, D = Death rate Let (B-D)=r or intrinsic rate of growth. Then, =r n where d is the rate of change, N = number of existing individuals. t= time and r= intrinsic rate of natural increase represents the rate of change in population size.