Expert: Richard J. Raridon - 1/15/2012

Question
Given the length and width (in feet and inches) of a rectangular room and the price per square yard for the carpeting, calculate the number of square yards of carpet to cover the floor, the cost for all the carpet, the sales tax (at 6.5% of the cost), and the total cost.


1.List all the inputs
2.List all the outputs
3.List all the constants that are required to move from the inputs to the outputs
4.List all the formulas that are required to move from the inputs to the outputs
5.List all the intermediate variables that are required to move from the inputs to the outputs
6.Make a table showing the inputs, intermediate variables, and outputs with 2 correct sets of values

Answer
1. length and width, cost per sq. yard, 6.5% tax
2. square yards, cost of carpet, amt. of sales tax, total cost
3. convert inches to feet by dividing by 12.  convert sq. ft. to sq. yards by dividing by 9,
multiply sq. yards by price/sq. yard, multiply carpet cost by 1.065 to get total cost.
4. sq. yards = LW/9, carpet cost = sq. yards times cost/sq. yard, multiply by 1.065
5. already listed
6. suppose you have L = 10ft, 6 inches and W = 7ft, 3 inches
area in sq. yards = (10.5)(7.25)/9 = 8.458 sq. yards.  at $9.50/sq. yard, cost is $80.35,
sales tax is $5.22 for a total cost of $85.57

you can make up another set