Out of these numbers which ones are multiples of 7 {−7, −4, 2, 14, 21, 34, 42}

Could someone with number 1 and 2

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?

What is the name of a polygon that has four congruent sides and theses angle measures 60,120,60,120?