One circular table has a diameter of 9 ft and another has a diameter of 20 ft how much greater is the area if the larger table

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.