Final answer:
The procedure described is accurately represented by summation notation as Σ (X+4)².
Step-by-step explanation:
The mathematical procedure described as "Add 4 points to each score, square the resulting values, and find the sum of these square values" can indeed be expressed using summation notation. The correct notation that represents this procedure is Σ (X+4)², which corresponds to option a). This expression means we're adding 4 to each individual value X, squaring the result, and then summing all those squared values.