The ratio of boys to girls in the school choir is 4:7. If there are 16 boys, how many girls are in the choir? F 19
G 28
H 27
J32

The number of chocolate chips in an 18-ounce bag of chocolate chip cookies is approximately normally distributed with a mean of 1252 chips and standard deviation 129 chips. (a) what is the probability that a randomly selected bag contains between 1100 and 1500 chocolate chips, inclusive? (b) what is the probability that a randomly selected bag contains fewer than 1125 chocolate chips? (c) what proportion of bags contains more than 1225 chocolate chips? (d) what is the percentile rank of a bag that contains 1425 chocolate chips?

What is always true when two whole numbers are subtracted?

Find the distance between the pair of points a(-1,8) and b(-8,4)