Exponent problem

Algebra Level pending

\[ (5 \times 2) ^ { 5 \times y } = 2^y \times k ^ y \]

Find the value of \( \log_{10} k \).

Note : \(y\neq 0\)

Use \(\log _{ 10 }{ 2 } \approx0.30\) and \(\log _{ 10 }{ 5 } \approx0.70\)

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