An empty box has a mass of 2.75 kilograms. an electronics store is packing 5 identical laptops in the shipping box. each laptop has a mass of 1.65. the cost to ship the box was $40.00 for the first 5 kilograms and $3.15 for each kilograms over 5 kilograms. what was the cost to ship the packed box?

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?