The profit from the sale of a certain appliance
increases, though not proportionally, with the number of units sold. Did the prot exceed $4 million on sales of 380,000 units? 1) The prot exceeded $2 million on sales of 200,000 units. 2) The prot exceeded $5 million on sales of 350,000 units. 答案是B,这道题的意思不是很明白!怎么入手? |