The formula for the area of a regular pentagon with side length "s" is:
A = (1/4) * √(5(5 + 2√5)) * s^2
Substituting s = 5 into the formula, we get:
A = (1/4) * √(5(5 + 2√5)) * 5^2
A ≈ 59.8
Rounding to the nearest tenth, the area of the regular pentagon is approximately 59.8 square units.