81.
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It's 1/81. You just take 9 to the second power and write the result as
a denominator since it's a negative power.
2^9 = 512 9^2 = 81
3 to the power of 2 is the same as saying 3x3, which equals 9. (The answer is 9.)
29 * 59 = (2 * 5)9 = 109 or a billion.
9 to negative 2 = 1/9 to plus 2 = 1/81
Nine to the second power is just nine times nine. Any number with a power is just a number that can multiply itself. 2 9 =9*9=81