The algorithm for dividing rational expressions applies to only nonzero rational expressions. why do you think that "nonzero" is specified in the algorithm? what would happen if you applied the algorithm to a rational expression that could be 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?