z varies directly as x and inversely as the square of y. If z=113 when x=7 and y=8, find z if x=5 and y=3. Round your answer to two decimal places if necessary.

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 graph below shows the height of a projectile t seconds after it is launched. if acceleration due to gravity is -16 ft/s2, which equation models the height of the projectile correctly?

Graph the line that represents a proportional relationship between d and t with the property that an increase of 33 units in t corresponds to an increase of 44 units in d. what is the unit rate of change of dd with respect to t? (that is, a change of 11 unit in t will correspond to a change of how many units in d? )