The following list of test scores has an average of 50 and an SD of 10: 39 41 47 58 65 37 37 49 56 59 62 36 48 52 64 29 44 47 49 52 53 54 72 50 50 (a) Use the normal approximation to estimate the number of scores within 1.25 SDs of the average. (b) How many scores really were within 1.25 SDs of the average?

Two farmers pay a total rent of $140 for a pasture. the first farmer placed $4 oxen in the pasture, and the second farmer placed $30 sheep in the pasture. the farmers split the rent based on the proportion of the pasture eaten by their own animals that month. how much should the first farmer pay, if 1 ox eats as much as 10 sheep in a month?