Ines is not sure if she has enough money to buy a skateboard. The board costs $85 plus the sales tax is 8%. How much money will she need to buy the skateboard? Show your work.

Inez has a phone card. the graph shows the number of minutes that remain on her phone card a certain number of days.

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

How are algebraic expressions evaluated using substitution?