Which of the quantities must be known before calculating the margin of error? the population size the population mean the population variance All of the answer options are correct.

Select the correct answer from each drop-down menu. consider the following polynomials equations. 3x^2(x-1) and -3x^3+ 4x^2-2x+1 perform each operation and determine if the result is a polynomial. is the result of a + b a polynomial? yes or no is the result of a - b a polynomial? yes or no is the result of a · b a polynomial? yes or no

Someone which statements are true? check all that apply.

Ineed some on this. not sure how to solve.