Brine shrimp are a tiny crustacean (about 1/4 inch in size when mature) that live in the Great Salt Lake in Utah. They are the staple food of many of the migratory bird populations that visit the Great Salt Lake and are also harvested to use as fish food. Brine shrimp hatch from eggs called cysts. As the Great Salt Lake has become more salty, it has made it more difficult for cysts to survive to maturity. We model this relationship using the function: P ( x ) = 2.2 x 2 + 44 x 140 where P ( x ) represents the percentage of brine shrimp cysts that survive to maturity when the salinity is x percent. If x = 3 , this means that the salnity is 3 % . If P ( x ) = 50 , then 50 % of the cysts survive to maturity. a) What is the percentage of salinity that maximizes the ability of the brine fish to survive? To answer this question, we'd find: the x-coordinate of the vertex Correct salinity: Correct % b) What would the survival rate be at this optimal percentage of salinity? To answer this