What is the expected value of x?
X 0 5 10 15 20
P 0.05 0.15 0.25 0.5 0.05

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.