A pulley system is being used to lift a 665kg piano to a 23rd floor apartment. if a force of 28000 N is applied by the person lifting the piano how tall is the 23rd floor if it took 133s to move the piano unit from rest on the ground to the 23rd floor?

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

Aman is 6 feet 3 inches tall. the top of his shadow touches a fire hydrant that is 13 feet 6 inches away. what is the angle of elevation from the base of the fire hydrant to the top of the man's head?

With finding limits of multi variable !