What is the area of a rectangle with a length of 5 and a width of 3?

To find the area of a rectangle, you multiply the length by the width. In this case, the length is 5 units and the width is 3 units.

So, the calculation would be:

Area = Length × Width

Area = 5 × 3

Area = 15 square units.

This means that the correct answer corresponds to the area of the rectangle, which is why the first choice is the correct one. The area represents the total space within the rectangle, and using the formula for area provides a straightforward way to understand how rectangles can be measured.