Union of two sets R and S is the set which contains all element, which are in either set R or S. The symbol for union is ∪, so t<span>he </span>union of two sets is written as R∪S.
<span>In our case, the sets are:
R = {10, 15, 20}
S = {20, 25}
The union for the sets R and S are:
</span><span>D. {10, 15, 20, 25}
Intersection on the other hand is the set that contains the elements that belong both in set R and set S. </span>
55. the central angels are the same, so the arc measure is the same
The answer is D because -14.6 is the least and is the only one that has -14.6 first.
