What is the common difference in this equation? f(n)=5n-8

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.

Which inequality comparing two of the expressions is true when 0.7 < x < 0.9

Aboat costs 19200 and decreases in value by 12% per year. how much will it cost in 5 years