A 23C pie is placed in a freezer which is being held at a constant temperature of 0C. The pie is then left in the freezer indefinitely. Describe the temperature as a function T (t), where t is hours after the pie is placed in the freezer. (b) A wedding photographer charges a flat fee of $375 for up to five hours of taking pictures during the wedding day. For bookings of more than five hours, the photographer charges $75 per hour. The photographer never books a wedding longer than 8 hours. Let C(h) represent the photographer's total charge as a function of h hours of work during the wedding day. (c) A 10 foot ladder leans against an upright wall so that the top of the ladder touches the wall h feet above the ground. Suppose additionally that the bottom of the ladder touches the ground a distance d feet from the wall. We can describe the distance d as a function of h