Answer: B. 
Step-by-step explanation:
1. By definition, the associative property of addition is:

2. Therefore, if you have the following expression:

You apply the Asociative property of addition by regrouping the numbers as following:

3. Then, you can conclude that the correct option is B.
Answer:20
Step-by-step explanation:
Answer:
9 ft
Step-by-step explanation:
its volume is equal to the area by height;
(2.5 x 3)h = 67.5
h = 9ft
Answer:
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Step-by-step explanation:
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