Final answer:
To find the cost to tile a bathroom of 90 square feet with tiles costing $11 per square yard, convert the square footage to square yards and then multiply by the cost per square yard, resulting in a total of $110.
Step-by-step explanation:
To calculate the cost of tiling a bathroom that is 90 square feet with floor tiles that cost $11 per square yard, you first need to convert square feet into square yards because the cost is given per square yard. There are 9 square feet in 1 square yard.
First, divide the total square footage of the bathroom by 9 to convert it into square yards:
90 square feet ÷ 9 square feet/square yard = 10 square yards
Next, multiply the number of square yards by the cost per square yard:
10 square yards × $11/square yard = $110
So, the cost to tile the bathroom will be $110.