Find the area of the shaded region in each figure

Which of the following are accepted without proof in a logical system? check all that apply.

I’m on question 7 it says a covered water tank is in the shape of a cylinder the tank has a 28 inch diameter and a height of 66 inches to the nearest square inch what is the surface area of the water tank

Two years ago a man was six times as old as his daughter. in 18 years he will be twice as old as his daughter. determine their present ages.