There were 400 lb of coal at a factory. every day, 50 pounds were used. express by a formula the dependence of the quantity of coal, p, in pounds, on time, t, in days.

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.