Problem

Use a calculator to evaluate the expression. \[ \frac{2 \ln 10+\log 20}{\log 49-\ln 7} \] \[ \frac{2 \ln 10+\log 20}{\log 49-\ln 7} \approx \square \] (Do not round until the final answer. Then round to three decimal places as needed.)

Solution

Step 1 :Calculate the natural logarithm of 10 and multiply it by 2, which gives \(2 \ln 10 = 4.605170185988092\)

Step 2 :Calculate the logarithm base 10 of 20, which gives \(\log 20 = 1.3010299956639813\)

Step 3 :Add the results from the first two steps, which gives \(4.605170185988092 + 1.3010299956639813 = 5.906200181652073\)

Step 4 :Calculate the logarithm base 10 of 49, which gives \(\log 49 = 1.6901960800285136\)

Step 5 :Calculate the natural logarithm of 7, which gives \(\ln 7 = 1.9459101490553132\)

Step 6 :Subtract the result from the fifth step from the result from the fourth step, which gives \(1.6901960800285136 - 1.9459101490553132 = -0.2557140690267996\)

Step 7 :Divide the result from the third step by the result from the sixth step, which gives \(\frac{5.906200181652073}{-0.2557140690267996} = -23.09689179062371\)

Step 8 :Round the final result to three decimal places, which gives \(-23.09689179062371 \approx -23.097\)

Step 9 :Final Answer: \(\boxed{-23.097}\)

From Solvely APP
Source: https://solvelyapp.com/problems/yJkDe1MjYk/

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