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>
ANSWER:
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Answer:
First statement is correct.
Step-by-step explanation:
In the first statement,
in the left hand side, 10 has -3 as its power but in the right hand side +3 is the 10's power.

According to 10's power, left hand side < right hand side.
Hence, there is no need to check the other statements.
Answer:
The volume of the irregular figure would be 144
.
Step-by-step explanation:
If you wish to make the process of calculating the volume easier, you can picture the irregular figure as two rectangular prisms: the large one on the bottom, and the smaller one appearing to protrude from the prism below it. Using this method, you only need to find the volumes of the two rectangular prisms and add the values together to get the volume for the irregular figure. The formula used to find the volume of a rectangular prism is
, where
,
, and
, represents the length, width, and height of the rectangular prism respectively. Using the formula above, the volume of the larger rectangular prism would be 12 * 3 * 3 = 12 * 9 = 108
, and the volume of the smaller rectangular prism would be 4 * 3 * 3 = 12 * 3 = 36
. So the volume of the entire irregular figure would be 108 + 36 = 144
.