Formulate the situation as a linear programming problem by
identifying the variables, the objective function, and the
constraints. Be sure to state clearly the meaning of each variable.
Determine whether a solution exists, and if it does, find it. State
your final answer in terms of the original question. A rancher
raises goats and llamas on his 400-acre ranch. Each goat needs 2
acres of land and requires $100 of veterinary care per year, and
each llama needs 5 acres...