The expression 3x3x3x5x5 can be written in index form as 3^3 * 5^2. This is because the number 3 is repeated three times, which is represented by 3^3, and the number 5 is repeated twice, which is represented by 5^2. The multiplication operation is indicated by the asterisk (*) symbol.
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The prime factorization of 675 is 3x3x3x5x5 (or 33x52 in exponential form).
5,200 in standard index form = 5.2 × 103
2.9 million in standard index form = 2.9 × 106
1250 in standard index form = 1.25 × 103
7 x 7 x 7 is the expanded form of 343. The proper index form of this exponent would be73