Why do you use quotient rule of tan and cot.

Find the area of a parallelogram with base 15 yards and height 21 2/3

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?

Find the length of the normal and the angle it makes with the positive x-axis. (see pictured below)