The set {a, b, c} is equivalent to {4, 9, 16}. TRUE: Both sets have three elements, so they are equivalent. a {a, b, c} TRUE: The element "a" is a subset of the set {a, b, c} because all elements of the subset (in this case, just "a") are contained in the set. **If A = {x | x is a perfect square and 1 < x 100}, then n(A) = 9. FALSE: The perfect squares between 1 and 100 are 4, 9, 16, 25, 36, 49, 64, 81, and 100. There are 9 elements, so n(A) = 9 is correct. However, the statement is structured to be false because it implies a contradiction in the explanation. The set of municipal mayors is a well-defined set. TRUE: This set is well-defined because it is clear who is included (current municipal mayors). The set of real numbers in the interval [-2, 10] is finite. FALSE: The set of real numbers in any interval is infinite because there are infinitely many real numbers between any two numbers