Ann went to the bookstore. She bought a softcover book which was marked 10% off. She spent $18 on the book. What was the original price?

45% of the trees in a park are apple trees. there are 27 apple trees in the park. how many trees are in the park in all?

The cross-sectional areas of a right triangular prism and a right cylinder are congruent. the right triangular prism has a height of 6 units, and the right cylinder has a height of 6 units. which conclusion can be made from the given information? the volume of the triangular prism is half the volume of the cylinder. the volume of the triangular prism is twice the volume of the cylinder. the volume of the triangular prism is equal to the volume of the cylinder. the volume of the triangular prism is not equal to the volume of the cylinder.

0if x and y vary inversely and y=6 as x=7, what is the constant of variation?