Can someone pls me with this math problem. i have the answer, but i don’t know how to get there. the answer is (26 and a) or (74 and b) acceptable range is between 20 and 30 for 26, and between 70 and 80 for 74.

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.

Acylinder and its dimensions are shown. which equation can be used to find v, the volume of the cylinder in cubic centimeters?

What is negative 3/9 times negative 2/8 ?