can someone show me how this problem would work out? I dont just want an answer I want to see how this problem is worked out. Thank you

(hurry! ) which expression is equivalent to the following complex fraction?

What is the distance between point a and b

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?