22. 23. 24. 25. The printed area of a page in a book will be 81 cm2. The margins at the top and bottom of the page will each be 3 cm deep. The margins at the sides of the page will each be 2 cm wide. What page dimensions will minimize the amount of paper? A rectangular rose garden will be surrounded by a brick wall on three sides and by a fence on the fourth side. The area of the garden will be 1000 m2. The cost of the brick wall is $192/m. The cost of the fencing is $48/m. Find the dimensions of the garden so that the cost of the materials will be as low as possible. A boat leaves a dock at 2:00 p.m., heading west at 15 km/h. Another boat heads south at 12 km/ h and reaches the same dock at 3:00 pm. When were the boats closest to each other? Two towns, Ancaster and Dundas, are 4 km and 6 km, respectively, from an old railroad line that has been made into a bike trail. Points C and D on the trail are the closest points to the two towns, respectively. These points are 8 km apart. Where should a rest stop he built to minimize the length of new trail that must be built from both towns to the rest stop