What is the result of \(25 \times 2.5 \times 0.25 \times 0.025\)?
Answer: A
We are multiplying powers of 25 with different decimal places.
The expression can be written as \(25^1 \times (25 \times 10^{-1}) \times (25 \times 10^{-2}) \times (25 \times 10^{-3})\).
This is equal to \(25^4 \times 10^{-1-2-3} = 25^4 \times 10^{-6}\).
\(25^2 = 625\).
\(25^4 = (25^2)^2 = 625^2 = 390625\).
So, the result is \(390625 \times 10^{-6} = 0.390625\).