Sharon and Lewis are 520 m apart. As Brandon flies overheard in an airplane, they measure the angle of
elevation of the airplane. The airplane is between Sharon and Lewis. Sharon measures the angle of
elevation to be 63' . Lewis measures it to be 36. What is the altitude of the airplane?

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?