(a) Given the following equation, x^4+3x^3-8x-16 use synthetic division to test the following 3 pts and show none is a root. Must show synthetic division for all 3 of the following test pts. Test these 3 possible root pts also called possible zeros using synthetic division. (x, y) = (-1, 0) ; ( 1, 0) ; (2, 0).

Recall that the owner of a local health food store recently started a new ad campaign to attract more business and wants to know if average daily sales have increased. historically average daily sales were approximately $2,700. the upper bound of the 95% range of likely sample means for this one-sided test is approximately $2,843.44. if the owner took a random sample of forty-five days and found that daily average sales were now $2,984, what can she conclude at the 95% confidence level?