In a village the cases of a particular infectious disease have been exponentially decreasing at a rate of 90% per year since the people started recieving the vaccine. If there were 100 cases to start with. Predict the number of cases after 2 years.

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.