The total cost after sales tax to fix Azar’s computer is represented by the expression 0.08(55h) + 55h, where h represents the number of hours it takes to fix Azar's computer. What percentage sales tax is Azar being charged?
What part of the expression represents the dollar amount of sales tax Azar must pay?

The head librarian at the library of congress has asked her assistant for an interval estimate of the mean number of books checked out each day. the assistant provides the following interval estimate: from 740 to 920 books per day. what is an efficient, unbiased point estimate of the number of books checked out each day at the library of congress?

Somone me i want to know what 18 hours out of 24 hours in a fraction

Don't know how to find x given these segment lengths