Equations
A. Cost = 20x
B. Cost = 10x + 50
C. Do not have this software
D. The two admission prices would be the same at x = 5. An example this simple can be done via trail-and-error but the solve function in Excel would do this for a more complex example.
E. Six people would cost $110 on the group special, $120 on the regular price. The easiest way to determine this is with an equation in Excel:
x
6
110
Group
120
Regular
F. It is better to go with the regular price for any number below 5, better to go with the group special any number above 5. As we previously established, at 5 it doesn’t matter which option you choose.
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