I am not sure what the set/sets are supposed to be...

  see the attachment

Step-by-step explanation:

(a) S1 is the set of all subsets of {t, u, v}. There are 2^3 = 8 subsets, the EMPTY set being one of them. They are listed in the attachment.

It seems likely your answer will need to match that shown in the attachment:

  {EMPTY, {t}, {u}, ... , {t, u, v}}

where the elements of multi-element sets are listed separately: {t, u}, not {tu}.

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(b) S2 is the set S1 with w added to each subset. (see the attachment for a listing)

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(c) Correct, the sets are disjoint, since every set in S1 is different from every set in S2.

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(d) Each set has 8 elements; the sets are the same size. You know this because you created set S2 from set S1. (See (b), above.)

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(e) The sets are disjoint (see (c)), so the total number of elements in their union is the total of the numbers of elements in each set: 8 + 8 = 16.

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(f) P(A) is undefined here, so none of these questions can be answered.

the median here is 25. your lowest value is 14 and highest value is 48. to find the third quartile, find the medium number in between 25 and 48 which would be 42 i believe.

its 4 because 2 times 2 is 4, if you double the number two you get four