Which of the following choices is the best representation of the change in population (ΔP) if the current population size is P=100 ? Write your answer in terms of r and/or h.
a. △P=100r-h
b. △P= (100+h)/r
c. △P=110h
d. △P=100-h
e. △P= (100+r)/h
f. △P= (100-h)/r