Final answer:
The unit rate for $320 for 18 square feet is approximately $17.78 per square foot when rounded to the nearest hundredth.
Step-by-step explanation:
The unit rate is defined as the cost for one unit of measure, which in this case is the cost per square foot. To calculate it, divide the total cost by the number of square feet.
Here's the step-by-step calculation:
- Start with the given total cost of $320 for 18 square feet.
- To find the unit rate, divide $320 by 18.
- The calculation will be $320 ÷ 18 = $17.ºr{7}.
- To round to the nearest hundredth, we get approximately $17.78 per square foot.