Find the work (in ft-lbs) required to empty a right cylindrical tank with a radius of 8 feet, a height of 6 feet, and a water level of 4 feet by pumping the water to the top of the tank. need to seek some formula! if so you so much

Sherrie is baking a pie for her family. she leaves the room and comes back to 35% of the pie having been eaten before she can put the topping on. how much 1 square inch strips of dough will she need for the top, now that a portion is missing? round your answer to the nearest while nimber.