Dad is 4 times as old as his son jim. in 10 years, dad's age will be 20 years more than twice jim's age. how old is jim?

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.