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a baker has modeled the monthly operating costs for making wedding cakes by the function y=0.5x^2 - 12x + 150, where the monthly operating costs in dollars and x is the number of cakes prepared.

a. what is the minimum cost?

b. how many cakes should be prepared each month to yield the minimum cost?

Grace is standing 18 feet from a lighthouse and kelly is standing 10 feet from grace. the angle that grace looks up to see the top of the lighthouse is 45°. the angle that kelly looks up to see the top of the lighthouse is y°. find the height, h, of the lighthouse. find the angle, rounded to the nearest tenth of a degree, in which kelly looks up to the top of the lighthouse. to the nearest tenth of a degree, find the value of x° . in two or more sentences, explain your calculations