Answer:
Area = 648 square inches
Explanation:
To find the cost of a new pane for Andrea, she needs to calculate the area of the glass windowpane.
The width of the windowpane is given as 18 inches, and the length is given as 36 inches.
To find the area of a rectangle, we multiply the length by the width.
Area = Length * Width
Area = 36 inches * 18 inches
Area = 648 square inches
Therefore, Andrea needs to calculate the area of the windowpane, which is 648 square inches, in order to find the cost of a new pane. The glass manufacturer charges by the square inch, so Andrea can multiply the area by the cost per square inch to determine the total cost.