C= 0.87

find the critical value zc necessary to form a confidence interval at the level of confidence shown above

zc= ?

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 *_*

The answer would be 2 times 3 plus 8 divided by 8 = 7