The table shows the number of minutes Jalen talks on his mobile phone and the cost of the phone calls. Jalen’s Mobile Phone Cost Number of minutes, x 150 220 250 275 Cost, y $7. 50 $11. 00 $12. 50 $13. 75 If the cost varies directly with the number of minutes Jalen talks on the phone, which equation represents the variation? y = 0. 05 x y = 20 x y = 157. 5 x y = 1125 x.

Zahra was given two data sets, one without an outlier and one with an outlier. data without an outlier: 15, 19, 22, 26, 29 data with an outlier: 15, 19, 22, 26, 29, 81

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 spreadsheet would be used to compute the first nine terms of the geometric sequence a^n=32•(1/2)n-1