If a rectangle has a length of 5 and a width of 3, what is its area?

To determine the area of a rectangle, you can use the formula:

Area = Length × Width

In this case, the length is 5 and the width is 3. By substituting these values into the formula, you get:

Area = 5 × 3 = 15

This calculation confirms that the area of the rectangle is 15 square units. Therefore, the correct answer is indeed 15, which aligns with the choice provided. This understanding reinforces essential mathematical concepts of area calculation for rectangles, ensuring clarity on how to properly apply the formula.