Hey refer to attachment!!!
Draw straight line from 220 (in thousands ) to the plotted line. Draw line parallel to x-axis from point where it touches the plotted line to the y -axis.
It'll automatically meet at 500 which is the answer..
All you need to do is to see the graph carefully.
Hope it helps *_*
<u>Given</u>:
Let X and Y be two sets.
The two sets are given by
and 
We need to determine the value of the set 
<u>Value of the set </u>
<u>:</u>
The value of the set
is the set that contains all the elements that are at least in one of the two sets.
Hence, the union of the set
is given by


Arranging in ascending order, we get;

Thus, the union of the sets X and Y is 
Answer:
Should be 620,000
Step-by-step explanation:
<span>Z-4/4+8
Z - 1 + 8
Z + (-1 + 8)
Z + 7</span>