Which relation is also a function? O A. {(7, 14), (14,7), (7, 21), (35, 28),
(21, 28)
B. {(14,7), (7, 14), (21,14), (28,35),
(28, 21)
1
2
6
C.
3
7
4
8
D. x 14 7
21 28 35
y 7
147
35 21

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