PLEASE ANSWERRR Write a function rule to represent the situation.
the total cost C for g grams of igneous rock if each gram costs $5.23
Write a function rule using C and g as variables.
(Type an equation.)

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