Posted by lisa on Saturday, December 17, 2011 at 11:43pm.
N(x)=0.6^2+15.6x+12, where x is the number of days since the concert was first announced, When will daily ticket sales peak and how many tickets will be sold that day
ticket sales peak
number of tickets sold

algebra  Damon, Sunday, December 18, 2011 at 4:34am
assume you mean:
N(x)= 0.6 x^2 + 15.6 x + 12
+0.6 x^2  15.6 x = N + 12
x^2  26 x = 1.6666 N + 20
x^2  26 x + 169 = 1.6666 N + 189
(x13)^2 = 1.6666 N + 189
(x13)^2 = 1.6666 (N  113.4)
13 days and 113 tickets

algebra  Damon, Sunday, December 18, 2011 at 4:36am
If you know calculus
dN/dx = 0 at max = 1.2 x + 15.6
1.2 x = 15.6
x = 13
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