Question 10 (1 point) What is the maximum number of turning points that the polynomial function Rx) - 4x' +9x - 3x'+ 2x? -5 can have? Oo 2 3 06 Question 11 (1 point) What is the remainder when x - 4 is divided into 3x* - 9x3 + 6x2 - 8x + 11? 1483 O 267 O 11 O-245 Question 12 (1 point) The harmonic mean of two numbers, a and b, is a number m such that the reciprocal of m is the average of the reciprocals of a and b. Which of the following is a formula for the harmonic mean of a and b? Im- Lab a + b Om = atb 2ab Om - atb 2 Om = - 2 at b