Can someone me with this question ..
the doctor tells the patient to cut back on coffee. the patient usually has four 8-oz cups of coffee per day. if the doctor told him to cut back by 25%, how many ounces of coffee can the patient have each day?
(enter whole number only)

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?