# Questions on Algebra: Logarithm answered by real tutors!

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 Question 752135: How to find log value for square root of 2*pi*n Click here to see answer by lwsshak3(7679)

 Question 752092: Rewrite the expression f(x) = ln (x^2-16 / x^5 )  using properties of logarithms. Click here to see answer by lwsshak3(7679)

 Question 752544: use log[2]3=(1.5850) and log[2]2=1 to approximate the value of the expression of log[2]9216 Click here to see answer by Theo(3556)
 Question 752544: use log[2]3=(1.5850) and log[2]2=1 to approximate the value of the expression of log[2]9216 Click here to see answer by tommyt3rd(3721)

 Question 752558: Use common or natural logarithms to solve the exponential equation symbolically. 2e^(6x+3)=4 Click here to see answer by Earlsdon(6294)

 Question 752631: Solve the equation log3(x)-log3(x-5)=1 I tried like this: log3(x/x-5)=1 3=(x/x-5) 3*(x-5)=x 3x-15=x 2x=15 x=15/2 but the answer should be x=5/4, where did I go wrong? Click here to see answer by Theo(3556)
 Question 752631: Solve the equation log3(x)-log3(x-5)=1 I tried like this: log3(x/x-5)=1 3=(x/x-5) 3*(x-5)=x 3x-15=x 2x=15 x=15/2 but the answer should be x=5/4, where did I go wrong? Click here to see answer by dkppathak(133)

 Question 752736: Write the given equation in logarithmic form. = 2,401 a. c. b. d. Click here to see answer by tommyt3rd(3721)

 Question 752775: I think I have to solve it using the log functions not sure the problem reads... solve equation 9^(x+3)=3^(4x-2) if not I got x=4 but that just by using guessing. I need to know how I get there using logs or if I do have to use them. Click here to see answer by Edwin McCravy(9717)
 Question 752775: I think I have to solve it using the log functions not sure the problem reads... solve equation 9^(x+3)=3^(4x-2) if not I got x=4 but that just by using guessing. I need to know how I get there using logs or if I do have to use them. Click here to see answer by ankor@dixie-net.com(16525)

 Question 752963: Can you help me solve this problem to 3 significant digits? 8^(5x)=13^(2x-4) So far I have done (2x-4)log (base 8) 13=5x Thank you! Click here to see answer by jim_thompson5910(29613)

 Question 752962: Can you help me write this problem as a single logarithm? 4log(base b)2-(1/3)log(base 9) b^15+1 So far I have compressed it into: log (base b) 16-log (base 9) b^5 +1 If you can help me thank you so much! Click here to see answer by Edwin McCravy(9717)

 Question 752679: what would be the answer of log base 5 of -25 and the same for log base 4 of -4 Click here to see answer by lwsshak3(7679)

 Question 753583: Solve the equation: round to three decimal places. Click here to see answer by solver91311(18785)

 Question 753589: Given log 2=.3010 and log 3=.4771, evaluate log 6 Can you multiply the logs to get the value of log 6, so log 2 × log 3 .3010×.4771=.14361 Log 6=.14361 ? Click here to see answer by MathTherapy(1817)

 Question 753693: Students in an english class took a final exam. They took quivalent forms of the exam at monthly intervals thereafter. The average score S(t), in percent, after t months was found to be given by: S(t) = 68-20 log (t + 1),t > or = to 0. 1.What is the average score when they initially took the test, t=0? 2.What is the average score after 14 months? 3.After what time t was the average score of 40%? Click here to see answer by stanbon(60778)

 Question 753720: how do you write as a single logarithm? Click here to see answer by Alan3354(34678)

 Question 753817: what is the approximate value of log10(225), given that log2 is 0.301 and log3 is 0.477 Click here to see answer by tommyt3rd(3721)

 Question 754004: Can you help me step by step how to solve this problem Im having a hard time solving this logarithm problem. Apply the properties of the logarithm in the following expression. log 15(square root) 8 12 thanks. Click here to see answer by Alan3354(34678)

 Question 754262: Hi, my name is jessica and my teacher gave me this two problems wich I still dont understand can somebody help me please. http://bit.ly/10F6h5T Click here to see answer by Alan3354(34678)

 Question 754239: use logarithms to evaluate : sqrt ( (0,345 x 0,0567)/ 24,3) Click here to see answer by Alan3354(34678)

 Question 754278: Question: Collapse log x + 4 log y - 2 log z? Click here to see answer by tommyt3rd(3721)