Micah is preparing for a piano recital he practices on monday for 50 minutes and on Wednesday for 90 minutes Micah increased his practice time by 40 minutes. What is the percent increase in Micah's practice time.

Which equation represents the function on the graph?

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

Solve the triangle. a = 21°, c = 105°, c = 5