Answer:

Step-by-step explanation:
we know that
The formula of law of cosines is equal to

where
a, b and c are sides. C is the angle opposite side c
In this problem we have

substitute the given values






The answer should be:
20.875
Hope this helps.
Answer:
42.5
Step-by-step explanation:
Answer:
4710
Step-by-step explanation:
Pi (or 3.14) x 2^2 x 6 = 75.36
ONE CUBIC FT is 62.5 pounds
75.36 x 62.5 = 4710 gallons!
YOUR WELCOME! :)