What is a rational number between 5.2 and 5.5

Which is the equation of a line perpendicular to the line with the equation 3x+4y=8

Witch represents the inverse of the function f(x)=1/4x-12

Part a: sam rented a boat at $225 for 2 days. if he rents the same boat for 5 days, he has to pay a total rent of $480. write an equation in the standard form to represent the total rent (y) that sam has to pay for renting the boat for x days. (4 points)