Sean is at the top of a light tower 800 ft above the sea level. he sees a boat in the distance and measures the angle of depression to be 3.5degrees. one hour later the angle of depression is 5.2degrees. how far did the boat travel in the hour?

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?