??????????????? "revenue"...thats income or TAKE ????????????
r=-13x^2+49,400x +2300
get slope=dr/dx...-2*13x +49,400
get slope=0...-26x=-49,400
or x=49,400/26...1,900
EVALUATE r at x=1900...-13*1900^2 +49,400*1900 +2300
1900^2=3,610,000...-13*3,610,000=-46,930,000
1900*49400=93,860,000
93,860,000 -46,930,000=46,930,000...add in 2300=46,932,300
me assume this be the HI
yuze quadratik equashun tu get zeroes...x=3800 or -0.046558134