Given that log10(2) ≈ 0.301 and log10(3) ≈ 0.477, what is the value of log10(18)?
Answer and explanation
Correct answer: D. 1.255
Express 18 in terms of prime factors: 18 = 2 3^2. Using logarithmic properties: log10(18) = log10(2 3^2) = log10(2) + 2 log10(3) = 0.301 + 2 (0.477) = 0.301 + 0.954 = 1.255.
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