某饲养场饲养了某种动物，每只动物每天至少需要蛋白质200克、矿物质4克、维生素5毫克。市场上销售的甲乙两种饲料每千克的营养成分及单价如下。
因此，饲养每只动物至少需要饲料成本 （ ） 元。
- A.6
- B.8
- C.10
- D.12
正确答案及解析
正确答案
解析
设饲料甲每天需要X克，饲料乙每天需要Y克。根据题意列不等式如下：50X+40Y≥200X+0.5Y≥40.5X+Y≥5Min（X+1.5Y）X，Y≥0
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