It can be written as 9^2.
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81 can be written as 8.10 × 101 in exponential notation.
81 = 8.1 x 10^1
3❹ * 1 = 81
The prime factors of 81 are 3x3x3x3 (or 34 in expontial form). The prime factors of 108 are 2x2x3x3x3 (or 22 x 33 in exponential form).
Exponential. 30 = 1 31 = 3 32 = 9 33 = 27 34 = 81