Answer:
20,000 tons plus 14 million
Completing the square goes back to pythagorean thm
but the way u do it, u want to find a value that enable u to take sqrt of both sides and solve
x^2-8x+3=0
x^2-8x=-3
we need (x-4)^2 so add 16
(x-4)^2=-3+16
(x-4)^2=13
x-4=sqrt13
x=4(+/-)sqrt13
If one of the numbers listed is 21 that should be the answer
A= 1/2(7 + 11)(5)
A = 1/2(18)(5)
A = 45 square units