I need help on my variables, and I need help now! Please... Which one of the following statements is true?

A. The input value is the dependent variable.

B. The input value is the independent variable.

C. The output is the independent variable.

D. The output value can be the dependent variable or the independent variable, depending on the situation.

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?

If a || b and b | y, then ? a) x || y. b) x | a. c) a | y. d) a || y.

Weekly wages at a certain factory are normally distributed with a mean of $400 and a standard deviation of $50. find the probability that a worker selected at random makes between $450 and $500