8. The volume of this pyramid is 351m3. If the area of the base is 81m2 , how tall is the pyramid? S S A 11m B 5 m C 13 m D 12 m I NEED THE ANSWER SOOON​
I ALSO NEED WORK FOR IT

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