Help me please its a timed TEST! Amiya works as a babysitter. Match the independent and dependent variables from the situation

Amiya works as a babysitter. She gets paid 9$ every hour she babysits.

Is a positive integer raised to a negative power always positive

If the altitude is drawn to the hypotenuse of a right triangle, then the two triangles formed are similar to the original triangle and to each other. which set of triangles shows the similar triangles created by the altitude in the diagram?

An engineer scale model shows a building that is 3 inches tall. if the scale is 1 inch = 600 feet, how tall is the actual building?