Find the area of the trapezoid. please help

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.

What is the measure of sty in oo below? 130 310 230 50

In order to be invited to tutoring or extension activities a students performance 20 point higher or lower than average for the