28. Mrs. Belland's science class does an experiment on bacteria. They find that the growth rate G of
bacteria can be modeled by G(t) = 8210-25 and
the death rate D is D(t) = 10.810.25, where t is
time in hours. Which function N shows the total
number of bacteria living at any one time t?
a. N(t) = 10.8+0.25 + 82+0.25
b. N(t) = 10.8+0.25 – 82+0.25
c. N(t) = 8210.25 + 10.8+0.25
d. N() = 82925 – 10.80.25