The point A(1,5) is rotated 90° clockwise around the origin. What are the coordinates of the resulting point, A'?

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?

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.

What is the solution of the equation? 35√(x+2)3+3=27