Algebra 2 - do not guess! explain your answer : )

how far does the barnacle travel in one revolution of the water wheel?

just the last question in the picture ^^ i got the other two! this question is very confusing and i forget how to do it so some would be great : ,)

will report any random guesses**

Julia is going for a walk through the neighborhood. what unit of measure is most appropriate to describe the distance she walks?

Jada has a meal in a restaurant she adds up the prices listed on the menu for everything they ordered and gets a subtotal of $42.00. after tax the total is 45.99. what percentage of the subtotal is the total?

Question 1 of 10 2 points different groups of 50 graduates of an engineering school were asked the starting annual salary for their first engineering job after graduation, and the sampling variability was low. if the average salary of one of the groups was $65,000, which of these is least likely to be the average salary of another of the groups? o a. $64,000 o b. $65,000 o c. $67,000 o d. $54,000