A certain business produced x rakes each month from November through February and shipped 0.5x rakes at the beginning of each month from March through October.The business paid no storage costs for the rakes from November through February, but it paid storage costs of $0.10 per rake each month from March through October for the rakes that had not been shipped.In terms of x, what was the total storage cost, in dollars, that the business paid for the rakes for the 12 months from November through October?
所以每個月存貨為 3月(3.5)4(3)5(2.5)6(2)7(1.5)8(1)9(0.5)10(0) 请问上面这个具体的数字是怎么算出来的，怎么知道是从4开始减的呢 Working alone at its own constant rate, a machine seals k cartons in 8 hours, and working alone at its own constant rate, a second machine seals k cartons in 4 hours.If the two machines, each working at its own constant rate and for the same period of time, together sealed a certain number of cartons, what percent of the cartons were sealed by the machine working at the faster rate?
京公网安备11010202008513号 京ICP证101109号 京ICP备12012021号
发表于 2010-9-13 12:02:55
收藏
收藏
楼主