. A tower is 42 metres high and stands on top of a hill. From a point some distance from the base of the hill, the angle of elevation to the top of the tower is 13.2°, and the angle of elevation to the bottom of the tower is 8.3°. Find the height of the hill.​

Which of the following are independent events? a) knowing that it is going to rain tomorrow, and bringing an umbrella to schoolb) knowing that you have to get up early tomorrow, and going to bed before 9 p.mc) knowing that it is going to rain tomorrow, and going to bed before 9 p.md) knowing that you have a test in school tomorrow, and studying thw night before