7. A publishing company wishes to make a book whose pages will each have an area of 54 in'. Each page is to have a =-in margin on the left and right, and a -in margin on the top and bottom. What must the dimensions of each page be to maximize the print arca? 8. Wind is blowing a kite horizontally at a speed of 15ft/s. At what rate is the angle between the string and the ground changing when the kite is 11 ft above the ground and 61 ft of string has been let out