Find the common ratio of the following geometric sequence. if necessary, use the slash bar ( / ) to enter a fraction. reduce fractions to their lowest terms., 2/5 , -4/15 , 8/45 , -4/15 , -8/45

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?

If the value of cos330°is√3/2 then find cos 165°.

Pl e a s e h e l p! i can’t find x in #28 for my homework