Answer:
7.5mi
Step-by-step explanation:
He will have more than enough because he only needs to cover 84.1425 square feet.
With every imaginary term, there are 2 complex conjugates with opposing signs. So if I had the term a+bi, the complex conjugate would be a-bi. So given your example of -1+4i, the complex conjugate would just be the opposite sign, now negative, to get -1-4i.
Use the formula 1/2(base1+base2)height. Substitute the values.
