Which of the following vectors are orthogonal to (2,1)? check all that apply. (-3,6) (-2,-3) (1,2) (1,-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?

Which ordered pair is a solution of the equation? 2x+3y=10

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