Explanation:
Log₁₀2 = 0.3010 and Log₁₀3 = 0.4771
Log₁₀4.5 = Log₁₀4¹/₂
= Log₁₀⁹/₂
= Log₁₀9 - Log₁₀2
= log₁₀3² - Log₁₀2
= 2Log₁₀3 - Log₁₀2
= 2(0.4771) - 0.3010
= 0.9542 - 0.3010
= 0.6532