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At a certain amusement park, there is a bulk discount for tickets. If you buy up to 60 tickets in one order, the price for each ticket is $\$70$. However if you buy more than 60 tickets in a single order, the price of every ticket is reduced by $\$1$ for each additional ticket bought. If $t$ is the number of tickets bought in bulk at one time, what is the largest $t$ which will bring the amusement park a profit greater than $\$4200$?

 Dec 5, 2020
 #1
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Quadratic formula: x = (-b +/- sqrt(b^2 - 4ac))/2a

optimal value of x = -b/2a

==> largest value of t is 78 dollars

 Dec 5, 2020
 #2
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Wrong 

 Dec 5, 2020

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