Please help

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The administrator of a large assisted living facility wanted to know the average age of the residents living at the facility. he randomly selected 12 residents and determined their age, listed here: 80, 65, 75, 83, 68, 73, 88, 79, 94, 72, 79, 68 what's the average age of the sample of residents? a. 79 years old b. 68 years old c. 75 years old d. 77 years old

Divide. –40 ÷ –5 a –8 b 200 c -200 d 8

Find the volume of the wedge cut from the first octant by the cylinder z=12-3y^2 and the plane x+y=2.