Curtland earned $ 3,600 in interest by Investing $7,500 at an annual simple interest rate of 8%. If he made no additional deposits or withdrawals, how many years did Curtland have to invest his money to earn the interest?

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