There are 90 new houses being built in a neighborhood. last month, 13 of them were sold. this month, 15 of the remaining houses were sold. how many houses are left to be sold?

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.