54 is 90% of what number

The step function g(x) is defined as shown.what is the range of g(x)? ***answer choices in picture.

At a sale this week, a desk is being sold for $213. this is a 29% discount from the original price. what is the original price?

Ms.ortiz sells tomatoes wholesale. the function p(x)=-80x^2+320x-10, graphed below, indicates how much profit she makes on a load of tomatoes if she makes on a load of tomatoes if she sells them for 4-x dollars per kilogram. what should ms.ortiz charge per kilogram of tomatoes to make on a load of tomatoes?