Astudent is standing 20 feet away from the base of a tree. he looks to the top of the tree at a 50 degree angle of elevation. his eyes are five feet above the ground. what is the height of the tree to the nearest foot

Ameteorologist is studying the monthly rainfall in a section of the brazilian rainforest. she recorded the monthly rainfall, in inches, for last year. they were: 10.4, 10.3, 11.7, 11.1, 8.0, 4.4, 2.6, 1.8, 2.5, 4.4, 7.3, 9.5 fill in the missing values in the formula. what is the variance?