H Assignment-13 Calculating Rate of Change 10p 67. Bighorn Sheep The cumulative horn volume for certain types of bighorn rams, fid in the Rocky Mountains, can be described by the quadratic function V(/) = -2159 + 1313/ - 60.82/2, where V(1) is the horn volume (in cm ) and r is the year of growth, 2 5 1 5 9. Source: Conservation Biology. (a) Find the horn volume for a 3-year-old ram. (b) Find the rate at which the horn volume of a 3-year-old ram is changing and interpret your results