Melinda will take 15 quizzes this semester. she would like to score a b or better on at least 90% of them. so far, she has gotten a b or better on 6 quizzes. which inequality can be used to determine how many more quizzes she must score a b or better on.

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