It costs a petroleum refinery $0.39 to refine one gallon of gasoline, and $0.39 to refine one gallon of natural gas. The refinery can sell gasoline for $2.11 per gallon, and can sell natural gas for $1.60 per gallon. Due to the refining
process, the refinery must produce and sell twice as much natural gas as it does gasoline. If the refinery's monthly overhead costs, not including production costs, are $180,000, how many gallons of natural gas will the refinery have sold when it breaks even each month? Round to the nearest whole gallon, if necessary.
a. 86,957
b. 141,732
c. 148,760
d. 217,392

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?

Joe has some money in his bank account he deposits 45$ write an expression that represents the amount of money in joe's account

If your score on your next statistics test is converted to a z score, which of these z scores would you prefer: minus2.00, minus1.00, 0, 1.00, 2.00? why? a. the z score of 2.00 is most preferable because it is 2.00 standard deviations above the mean and would correspond to the highest of the five different possible test scores. b. the z score of 0 is most preferable because it corresponds to a test score equal to the mean. c. the z score of minus2.00 is most preferable because it is 2.00 standard deviations below the mean and would correspond to the highest of the five different possible test scores. d. the z score of minus1.00 is most preferable because it is 1.00 standard deviation below the mean and would correspond to an above average