Scores on a national English test are Normally distributed, with a mean score of 510 and a standard deviation of 75. Jaxon’s test score is in the 85th percentile. What is his test score, rounded to the nearest whole number? Find the z-table here.

549
561
573
588

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