What is \log_{10}2000+\log_{10}400+4\log_{10}25+5\log_{10}20 equal to?
- A. 10
- B. 16
- C. 18 ✓
- D. 20
Correct Answer: C. 18
Explanation
Using logarithmic properties, it evaluates to \log_{10}(2000 \times 400 \times 25^4 \times 20^5) = \log_{10}(10^{18}) = 18.
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