Trying to show how you how many 1/4 cups are in 6 1/4 cups

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?

At your job you're paid $50 per week plus $3 per sale at least how many saled do you need to make in order to have over $250

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?