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英语翻译1,A rectangular field is to be fenced off along the bank

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英语翻译
1,A rectangular field is to be fenced off along the bank of a river-no fence is required along the river.If the material for the fence cost 8 per running foot for the two ends and 12 per running foot for the side parallel to the river,find the dimensions of the largest possible area that can be enclosed with 3600 worth of fencing.
2.A box anufacturer wishes to construct an open-topped box of volume 932 in^3 where the base is a rectangle having a length twice its width.
a.Use your graphics calculator to estimate the dimensions of the box constructed from the least amount of manterial.( give your window setting).
b.confirm your estimates in part a analytically using calculus.
3.A handbill is to contain 50 square inches of printed matter,with 4-inch margins at the top and bottom and 2-inch margins on each sie .What dimensions for the page would use the least paper
1.在河边有一个矩形区域围成的围栏,如果材料费是,垂直于河边的2个边是 8/英尺,平行与河的那1个边是 12/英尺,那么3600 可以用来围成多大面积?
2.一个盒子制造商打算做一个顶部没盖的盒子,容积要932立方英寸,而且底部矩形要求 长 是 宽 的 2倍.
a.使用你的图形计算器用最少的材料来估计这个盒子的尺寸.(给你的窗口设置).
b.使用微积分确认你的估计部分演算.
3.一个印刷品大约50平方英寸,底部和顶部有4英寸的边儿,2个侧边有2英寸的边儿,那么这个纸张所需的最小尺寸(长*宽)是多少?