Question 1040686
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Find the cardinal number of each of the following sets.


&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Cardinal number of a finite set is the number of elements in the set.</U>


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a.  &#8203; {100&#8203;, 101&#8203;, 102&#8203;, 103&#8203;,...120&#8203;}      This set contains 21 element. --->  The cardinal number is 21.

c.  &#8203; {x|x=k^2&#8203;, k=&#8203;1, &#8203;2, &#8203;3,...67&#8203;}       This set contains 67 elements. --->  The cardinal number is . . . what? 

b.  &#8203; { 100, 102, 104,...300&#8203;}          This set contains 101 elements. --->  The cardinal number is . . . what? 

d.  &#8203; {(1, 2), &#8203;(100&#8203;, 101&#8203;), &#8203;(0, 104&#8203;)}   There are 4 (four) elements in this set. Hence, the cardinal number is 4.

    (the elements of this set are pairs of numbers)
</pre>

Your list goes in the strange order: a), c), b), d).