I found a, how do I find b?

Question

In 2003, 71 deer were introduced into a wildlife refuge area from which the population had previously been hunted to elimination. By 2006, the population had grown to 123 deer. If this population grows exponentially, find the values of  and  in the formula for the function 

a= _71_

b= ____

Round to the nearest deer, and round to one decimal.

Answer 1

123=71b^3

123/71=b^3

(123/71)^(1/3) =b

1.20=b

The exponential model for the population of deer is

f(x)=71(1.2)^t