高校问答碳排放计算方法:数学题！！！
来源：百度文库 编辑：高校问答 时间：2024/04/27 05:18:49
2. on a typical long distance call you talk for 30 minutes. on a typical local call you talk for 10 minutes. your phone company offers a special low rate of $0.08 per minute for long distance calls and 0.03per minute for local calls,for customers who spend at least 240 minutes on the phone per month.your parents have set a limit of no more than 15 long distance calls per month and 30 local calls per month. how many minutes of long distance and local calls shouldyou make to qualify for the special rate plan and minimize your phone bill?
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请将第二题的计算方法列出来。
1、
x*4+y*0.5<=16;
x*1+y*0.5<=10;
z=x*35+y*10=(x*4+y*0.5)*m+(x*1+y*0.5)*n;
解出来m=5,n=15;
所以z<=5*16+15*10=230;最大值出现在把准备时间用完的解上。
此时bread(x=2),muffins(y=16);
2、
此题一定是把限制以内的低价通话用完，再用昂贵的长途
所以24个本地电话，耗资24×10×$0.03=$7.2是符合要求的最低消费
1. 2 batches of bread and 16 batches of muffins should be made to maximize profits which is $230.
2. 24 local calls and 0 long distance calls should you make to minimize your phone bill ,and your it will be $7.2.
1.因为x*4+y*0.5<=16;
x*1+y*0.5<=10;
z=x*35+y*10=(x*4+y*0.5)*m+(x*1+y*0.5)*n;
m=5,n=15;
所以z<=5bread(x=2),muffins(y=16);
*16+15*10=230
1、
x*4+y*0.5<=16;
x*1+y*0.5<=10;
z=x*35+y*10=(x*4+y*0.5)*m+(x*1+y*0.5)*n;
解出来m=5,n=15;
所以z<=5*16+15*10=230;最大值出现在把准备时间用完的解上。
此时bread(x=2),muffins(y=16);
2、
此题一定是把限制以内的低价通话用完，再用昂贵的长途
所以24个本地电话，耗资24×10×$0.03=$7.2是符合要求的最低消费
1. 2 batches of bread and 16 batches of muffins should be made to maximize profits which is $230.
2. 24 local calls and 0 long distance calls should you make to minimize your phone bill ,and your it will be $7.2.