Haley bought square tiles measuring 10 inches on each side to tile her kitchen. each tile cost $2.39 find the cost per square foot, round to the nearest cent

Me because some of question i don’t understand

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?

3c2 + 2d)(–5c2 + d) select all of the partial products for the multiplication problem above.