recycled cds incorporated, offers a choice of 5 used cds for $27, with each additional cd costing $3. write a cost function for purchasing 5 or more cds. what will the cost of buying 15 cds be ? let x represent the number of cds over 5.

Abby is collecting rainfall data. she finds that one value of the data set is a high-value outlier. which statement must be true? abby will use a different formula for calculating the standard deviation. the outlier will increase the standard deviation of the data set. the spread of the graph of the data will not change. abby will not use the mean when calculating the standard deviation.