Question

ap 微积分的两道题求解！详见问题补充！紧急！！！！！！！！！！！万分感谢

两道涉及ap求导知识的题目。紧急啊！！！！！！
1.a long rectangular sheet of metal, 12 inches wide, is to be made into a rain gutter by turning up two sides at right angles to the sheet. how many inches should be turned up to give the gutter its greatest capacity?
2.a manufatcturer sells a certain article to dealers at a rate of $20 each if less than 50 are ordered. if 50 or more are ordered the price per article is reduced at a rate of 2 cents times the number ordered. how should he proceed to arrive at his destination in the least time?

Answer 1

Please click the picture to magnify it and then click it using the right key in mouse to store the picture in your deskop !