Henry bought a package of cough drops for $3.79. He gave the clerk a $5 bill. How much change should he receive?

Can someone me with this problem . show your work .

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.

Rose bought a new hat when she was on vacation. the following formula describes the percent sales tax rose paid b=t-c/c