作业帮 > 英语 > 作业

SAT1 The cost for coal from a certain company is $15 for the

来源:学生作业帮 编辑:作业帮 分类:英语作业 时间:2024/05/24 02:15:06
SAT1
The cost for coal from a certain company is $15 for the first pound plus $6 for each additional pound of coal.Which of the following functions gives the total pound of coal C(P),in dollars,for p pounds of coal?答案是C(p)=6p.但我做的确是C(p)=6p+9,麻烦告诉我错哪里了,
if P is bigger than 1,C=21P-6
if P is 1,C=15
i think the answer is not right,hope it helps