I believe the school is 35.2 ft. tall. call me out if I'm wrong.
To determine the units needed to have the lowest cost, we need to do minimization of the equation of cost. We get the first derivative of the equation and equate it with zero. Then, determine the value of x.
<span>C = 0.25x2 - 80x + 30000
C' = 0.5x - 80 = 0
x = 160 units
Hope this answers the question.</span>
This is the way you solve it
<span>7 divided by 798 is
1/114 for fraction form
0.008871989860583 for decimal form</span>
