The measures of angles of jkl are in the ratio 2: 3: 4. what are the measures of the angle.

Find the sum of 4x^{2} -4+6 and -7^{2} +3x+1

The parabola x = y² - 9 opens: a.)up b.)down c.) right d.)left

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