Alma borrows money from her mom to buy $150 bike. she gives her mom $40 at the time of the purchase and continues to pay her $10 each month until the bike is paid for in full. alma wrote this equation to represent the amount y that she will have paid her mom after x months

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