Help me find the rate of change

Write the percent as a fraction or mixed number in simplest form. 0.8%

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

Use a standard normal table to determine the probability. give your answer as a decimal to four decimal places. −1.5< < 1.5)