Can someone answer. there is one problem. there's a picture.

It's 12ft because you start dividing 452.39 by 4 and then by pi. Then you get 36=r squared. If you take the square root of both sides, you get 6=radius. The diameter will be 12 ft.

Answer to your question: a. the fundamental theorem of algebra tells you that the equation will have two complex roots since the degree of the polynomial is 2. the roots are ​ x=1±i7√2 .number of roots=degree of polynomialhere, degree of polynomial is 2 so number of roots will be 2.hope it *_*