Rosita had 17 subtraction problems and 28 multiplication problems. if she ca finish five problems in 20 minutes, how long will it take her to finish all the problems?

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.