Q. Evaluate the logarithm.Round your answer to the nearest thousandth.log4(191)≈
Understand Problem: Understand the problem and identify the logarithmic property to use.We need to evaluate the logarithm of a fraction, which is log4(191). To do this, we can use the property of logarithms that states logb(QP)=logb(P)−logb(Q).
Apply Property: Apply the logarithmic property to the given expression.Using the property from Step 1, we can write log4(191) as log4(1)−log4(19).
Evaluate Log(1): Evaluate log4(1).The logarithm of any number at its own base is 1, and since 1 is the multiplicative identity, log4(1)=0.
Evaluate Log(19): Evaluate log4(19) using a calculator.Since 19 is not a power of 4, we need to use a calculator to find the value of log4(19). This is typically done by using the change of base formula: log4(19)=log(4)log(19).
Perform Calculation: Perform the calculation using the change of base formula.Using a calculator, we find that log(19)≈1.27875 and log(4)≈0.60206. Therefore, log4(19)≈0.602061.27875≈2.123.
Combine Results: Combine the results to find the final value.Now we combine the results from Step 3 and Step 5: 0−2.123=−2.123.
Round Final Value: Round the result to the nearest thousandth.Rounding −2.123 to the nearest thousandth gives us −2.123.