Question

11. An open box is formed by cutting squares with side lengths of 3 inches from each corner of a square piece of paper. What is a side length of the original paper if the box has a volume of 675 cubic inches?
(Points : 4)
21 inches
24 inches
33 inches

36 inches






Question 12. 12. The weekly cost (C) of growing and selling x acres of flowers is approximated by C = 0.25x2 10x + 305. How many acres of flowers would minimize these costs?
(Points : 4)
20 acres

25 acres

30 acres

40 acres

Answer 1

First is 21 inches

Answer 2

and the second is 25(:

Answer 3

thx! :)