Answer:
The value of this expression is -35.
Step-by-step explanation:
Let's use the order of operations (PEMDAS), to solve this problem.

In conclusion, the value of this expression is -35. Hope this helped :D
A=(a+b)*h*1/2=(20+8)*7*1/2=49 m2
V=A*H=49*2=98 m3
Answer:

<h3>
<em><u>2√6</u></em> is the right answer.</h3>