Find the distance between the following pairs of points. give your answer correct to 2 decimal places if necessary.
(a) (2, 4) and (5, 0)
(b) (8, 1) and (2, -7)
(c) (-4, 6) and (1,-6)

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?