1213 students went on a field trip. seven students traveled in cars and six buses were available. how many students would ride on each bus

Last one and the bottom answer choice is y=(x-4)^2+1 you guys!

What is the slope of the line shown below?

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