To encourage large group sales, a theater charges two rates. If your group is less than 11, each ticket costs $9.75. If your group is 11 or more, each ticket costs $6.75. Write a case-defined function to represent the cost of buying n tickets.

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the law of definite proportions states samples of a compound will always contain the same proportion of elements by mass. in other words, a given compound will always contain the same elements in the same proportions by mass.the law of multiple proportions states when two elements combine with each other to form more than one compound, then the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.