List all elements of each set: The set of all positive proper fractions with a denominator of 7

The set of all positive proper fractions with a denominator of 7 is .

Step-by-step explanation:

A proper fraction is of the form where the numerator is less than the denominator, i.e. x < y.

A set is a collection of items that belong to a certain experiment. Every member of a set are known as elements.

In this case we need to form a set of all positive proper fractions with a denominator of 7.

So, it is provided that y = 7.

Then the value of x has to be positive and less than 7, i.e. 1 < x < 7.

The set is:

Thus, the set of all positive proper fractions with a denominator of 7 is .

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  There are 200 animals, and the cost is $10,000 daily.

Step-by-step explanation:

The problem statement tells you that ...

  (x, f(x)) represents (hundreds of animals, thousands of dollars)

Then (2, 10) represents (200 animals, 10,000 dollars)