校服秋装每套58元,冬装每套82元.四甲班共有学生30名,每人各订一套秋装和冬装,共需多少钱?
(58+82)×30
=140×30,
=4200(元),
答:共需要4200元.
The manger has got a good business ______, so the company is doing well. [ ]
A. idea
B. sense
C. thought
D. thinking
抛物线的x2=16y焦点坐标为______.