The total mass of abdul and his baby brother is 15.25kg . the mass of abdul and his father is 72.25kg . the mass of abdul's father is 13 times as heavy as abdul's baby brother. what is abdul's mass?

State if the two triangles are congruent. if they are, state how you know?

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

My hour hand points between the 8 and the 9 in 35 minutes it will be the next hour. what time is it ?