I not sure what the answers are can someone please help me its due at 9am today .

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.

Simply 8x squared + 5(7x squared- x) - 2x =

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class