A company is planning to manufacture snowboards. The fixed costs are $100 per day and total costs are $5500 per day at a daily output of 20 boards. The average cost per board for an output of x boards is given by (x)=C(x)/x. Find the average cost function.

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step-by-step explanation:

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180

step-by-step explanation:

there is only one way to arrange all the eight relative to each other because they are not distinct. we have

now there are nine places to place an (and not more than one in one place).   because we have four symbols, we need to choose four of these nine places to insert an . order does not matter because the are not distinct.

thus there are 1 · c(9,4) ways, or, if we calculate it,

thus there are 126 ways to form such "words."