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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 50 cents 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?

 Oct 23, 2020
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The largest such t is 82.

 Oct 24, 2020

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