White shapes and black shapes are used in a game.
some of the shapes are circles.
all of the other shapes are squares
the ratio of the number of white shapes to the black shapes is 3: 7
the ratio of the number of white circles to the number of white squeres is 4: 5 the ratio of the number of black circles to the number of black squesres is 2: 5 work out what fraction of all the shapes are circles

1. suppose that scores on a knowledge test are normally distributed with a mean of 71 and a standard deviation of 6. a. label the curve: show the mean and the value at each standard deviation: b. if angelica scored a 76 on the test, what is her z-score? (draw her score on the curve above and label) c. what percent of students did angelica score higher than? how can you tell? d. if 185 students took the test, how many students scored higher than angelica?