25 in scientific notation is 2.5 × 10^1 since you shift a decimal place to the left from the starting point of 25.0.
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25 * 105 = 2.5*106 in scientific notation.
The number 25,000,000 can be written as 2.50 × 107 in scientific notation.
2.5*104
10000000000000000000000000 = 1×10^25 It is often abbreviated to 10^25.
0.000 25 = 2.5 x 0.0010 = 2.5x10-4