A researcher in a submarine begins at the surface of the ocean. The submarine descends 20.7 meters and then ascends 5.7. What is the depth of the submarine.

A. -26.3 meters
B. -14.9 meters
C. 14.9 meters
D. 26.3 meters

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?