Chase went sledding down a hill. He thought he went 40 feet down the hill; he actually went 32 feet on his sled. What was his percent error of distance the sled went down the hill?

Solve |2x - 5| = 4 if anyone could , that would be great

What is the probability of drawing three queens from a standard deck of cards, given that the first card drawn was a queen? assume that the cards are not replaced.

Apinhole camera is made out of a light-tight box with a piece of film attached to one side and pinhole on the opposite side. the optimum diameter d(in millimeters) of the pinhole can be modeled by d=1.9[ (5.5 x 10^-4) l) ] ^1/2, where l is the length of the camera box (in millimeters). what is the optimum diameter for a pinhole camera if the camera box has a length of 10 centimeters