hello guys, this is easy for the highschoolers bc im in middle, anyways.. i know that 60 mins is in an hour and there r 3 hours, i mulitplyed that nd got 180. im just having trouble with this.. an i have 5 more of these to do. if you can, can u show work?

If 1/√5+1/√5+1=p+q√r , find the values of p, q and r

Which graph represents the function g(x) = |x + 4| + 2?

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