Choose all that correctly factor the linear expression, a) 25x + 5xy 5x(5 + y) b) 8xz − 12xy −4x(2z + 3y) c) 9xyz + 3xy 3xy(3z + 1) d)5xz − 18xyz xz(5 − 18y)

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?