find the probability:

a spinner has an equal chance of landing on each if it's six number regions. you spin twice. the first spin lands in region one and the second spin lands in region two.

round answers to the nearest tenth.

a. 0.09
b. 0.0625
c. 0.273
d. 0.028

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