A local boutique marks up all merchandise by 45%. If she purchases a dress wholesale for $28, what will be the sale price at her boutique? Help please

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.

This is different from the first one can someone me

Hi i’m not sure how to do question 20 if u could explain how to do it that’d b great