Shade in a base of the trapezoidal prism. (The base is not the same as the bottom.)

1. Find the area of the base you shaded.
2. Find the volume of this trapezoidal prism.

For each diagram, decide if is an increase or a decrease of . Then determine the percentage that increased or decreased to result in .

Noah is visiting his aunt in Texas. He wants to buy a belt buckle whose price is $25. He knows that the sales tax in Texas is 6.25%.

1. How much will the tax be on the belt buckle?
2. How much will Noah spend for the belt buckle including the tax?
3. Write an equation that represents the total cost, , of an item whose price is .