Tanisha used this table to compare the number of school yearbooks purchased

1. the following set of data represents the number of waiting times in minutes from a random sample of 30 customers waiting for service at a department store. 4 5 7 10 11 11 12 12 13 15 15 17 17 17 17 17 18 20 20 21 22 22 23 24 25 27 27 31 31 32 a. determine the number of classes and class interval.

Solve the formula ax+ by = c for x.

Acompany made a profit of 75000 over a period of 6 years on an initial investment of 15000 what is the annual roi