Students in a summer art class paint a rectangular mural. The shorter side of the mural measures 5 yards. The longer side measures 3 yards longer than the shorter side. How many square yards is in the mural's area?

The shorter side of the mural measures 5 yards.

The longer side measures 3 yards longer than the shorter side, so it is 5 + 3 = 8 yards.

To find the area of the mural, we multiply the two sides together:
5 yards x 8 yards = 40 square yards.

Therefore, the area of the mural is 40 square yards.