Answer: 
Step-by-step explanation:
Formula: Volume = 
a is the length of the base's edge and h is the height. Since 16 is the length we would square it as it is the length, then we would multiply it by the height which is 20 ft.
<u>Steps: Multiply</u>
Volume = 
= 
= 
~I hope I helped you :)~
Step 1) Find the area of the trapezoid:

Step 2) Find the answer:

So the answer is
56
I went in order from top to bottom. don't know if this was what you meant...... (1,2), (2,-2), (3,-6), (4,-10).
Answer:
sqrt41
Step-by-step explanation:
a^2+b^2=c^2
25+16=41
sqrt41