Question 1 1 pts An athlete leaves a given point 0 and runs north at 15 km per hour. One hour later, a car leaves the point 0 and travels east at 40 km per hour. At what rate in km per hour is the distance between the athlete and the car changing at the instant the car has been traveling for 1 hour? [Give the numerical answer only without the units] Question 2 1 pts A rectangular sheet of cardboard of size 45 cm by 21 cm is made into an open box by cutting away squares of equal size from each corner and folding up the sides. Let A cubic cm be the largest volume of such a box that can be made in this way. Determine the value of A. Question 3 1 pts Suppose that a weight is to be held 10 meters below a horizontal line AB by a wire in the shape of the letter Y If the points A and B are lth/E metres apart, what is the shortest length in meters of the wire that can be used? [Give the numerical answer only without the units] A 1W3 B