True or false: in building a confidence interval for a proportion you can cut the margin of error in half (from e to e/2 by doubling the sample size (from n to 2n.

I think this is false. p +/- z*sqrt (pq/n) . Notice that the formula has sqrt of n.

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 *_*