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No, 82 is not a multiple of 9 because 9 can not be multiplied by any whole number to get 82. (9x9=81, 9x10=90, there is no 82 in between).
"2 to the power of 4" is written "two to the fourth power", and "8 to the power of 2" is known as "eight squared". And, eight squared is greater than two to the fourth power. Eight squared is 64, and two to the fourth power is 16.
X to the power 2 is written as - X^2
The GCF of 108 and 144 is 36, or 2^2 x 3^2
The GCF is 5x2