Solve for x to the nearest tenth.

please help i’m failing

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes

What is the mean of the data set 125, 141, 213, 155, 281

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