Answer
A) The number of square centimeters in 1-inch square is 6.4516.
B) The number of square inches in 129 centimeters squared is 20.
Work Step by Step
For Part A) 1 centimeter = 2.54 inches, so 2.54 squared is 6.4516.
For Part B) 129 inches/6.4516 = 20 centimeters squared.