The triangle has an only acute angle
Answer: 
Step-by-step explanation:
1. By definition, if
when
, then:

2. Keeping this on mind, to find the value of
when
, you must apply the following proccedure:

3. Now, you must solve for
, as following:

4. Then, the result is:

Answer:
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Step-by-step explanation:
The figure is equal to 102.5 cubic feet.