What is surface are of box with 12x6x9.5

486 units squared

Step-by-step explanation:

Surface area of a box is the combined area of all the faces.

2(12•6)+2(6•9.5)+2(12•9.5)=2(72)+2(57)+2(114)=144+114+228=486

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 *_*