A ticket to a school dance is $8.Usually,300 students attend.The dance committee knows that for every $1 increase in the
问题描述：
A ticket to a school dance is $8.Usually,300 students attend.The dance committee knows that for every $1 increase in the price of a ticket,30 fewer students attend the dance.What ticket price will maximize the revenue?
答
set ticket price as x y=（300- 30(x-8)/1) * Xy=-30x的平方+540x+0写成顶点式y= -30（x-9)平方+2430in order to let y get the maximum value let X-9=0therefore when x=9,y has the maximum value 243011年级的...