Which statement is not used to prove that triangle abc is similar to triangle ade?

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.

Evaluate the expression for the given value of the variable 2×(c2-5) for c=4

I'm confused on this could anyone me and show me what i need to do to solve it.