Mrs. hicks is buying donuts for her favorite class. the cost for the first dozen is $15. since she has more than 12 students she'll need to purchase additional donuts at a cost of $1 each. write a piecewise function showing the cost of x donuts.

Patel’s class voted on their favorite color. patel plans to make a circle graph to display the results. which statements are true about the circle graph patel can create? check all that apply.

Twenty-five percent of the customers entering a grocery store between 5 p.m. and 7 p.m. use an express checkout. consider five randomly selected customers, and let x denote the number among the five who use the express checkout.

17. a researcher measures three variables, x, y, and z for each individual in a sample of n = 20. the pearson correlations for this sample are rxy = 0.6, rxz = 0.4, and ryz = 0.7. a. find the partial correlation between x and y, holding z constant. b. find the partial correlation between x and z, holding y constant. (hint: simply switch the labels for the variables y and z to correspond with the labels in the equation.) gravetter, frederick j. statistics for the behavioral sciences (p. 526). cengage learning. kindle edition.