# Questions on Algebra: Logarithm answered by real tutors!

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 Algebra: Logarithm Solvers Lessons Answers archive Quiz In Depth

 Question 572811: I am not sure of the catergory so I apologize. I want to rewrite this equation lnk2-lnk1= -Ea/R (1/T2- 1/T1) to solve for Ea. Click here to see answer by solver91311(17077)

 Question 572953: log base 8 of (x) + log base 8 of (x+2)=3 Click here to see answer by nerdybill(7011)

 Question 573517: How do you express logarithms in exponential form? I know how to do some but on this paper it has Loga b= c and I have no idea how to do that honestly. Please help. Click here to see answer by stanbon(57984)

 Question 573679: log four to the base eight + log sixteen to the base eight Click here to see answer by josmiceli(9819)

 Question 573761: Please answer my question. Kindly solve the equation and find the solution set. log base of 3 (2x-3)+log base of 3 (x-4)=1 Click here to see answer by htmentor(809)

 Question 574198: Suppose that F(x) =log 2 (x+1)-3 a) what s the domain of F? what is F(7)? what point is on the graph of F? b) if F(x)=-1, what is x? what point s on the graph of F? c)What is the zero of F please explain me or show me how should I do b, and c, i do know how to do a. Click here to see answer by jsmallt9(3296)

 Question 573985: How to put Log2(x-3)+1 in the calculator and how to get the domain and range? please Click here to see answer by jsmallt9(3296)

 Question 573964: Express y as a function of x (The constant c is a positive number): ln(y+4) = 5x + ln(c) Click here to see answer by jsmallt9(3296)

 Question 574430: express the following as a single logorithm Log20 + log5 - log 25 determine the value of the following Click here to see answer by nerdybill(7011)

 Question 574484: How would you rewrite this into a single expression > log6+log5-log8? Click here to see answer by Edwin McCravy(8999)

 Question 574529: log2x(216)=x I know the answer is 3 (Calculator), but I don't know the steps required. Click here to see answer by KMST(1936)

 Question 575012: Write each expression as a sum and/or difference of logarithms. Express powers as factors. I have it simplified to but I don't know what to do next! I know that e is the standard ln form so would the next step be Thanks! Click here to see answer by lwsshak3(6770)

 Question 576330: i am needing some help with my log homework. the question is: find the values of the following logs, Given: Log 4 = M and log 7 = P Answers will be in terms of M and P Log28 Click here to see answer by josmiceli(9819)

 Question 576337: find the values of the following logs, Given: Log 4 = M and log 7 = P Answers will be in terms of M and P log40 Thanks sooooo much!! Click here to see answer by solver91311(17077)

 Question 576546: Write the expression as the logarithm of a single quantity. 1/2 ln x+ 2 ln y- 3 ln z Click here to see answer by Alan3354(31538)

 Question 577641: Hi, i am in year 12 maths B and don't understand how to use logarithms at all. An example of a question i am having difficulty with is: Use logarithms to solve: 7^x = 1/343 Thankyou for your help in advance Click here to see answer by Alan3354(31538)

 Question 577753: Convert log4.5 in the terms of log2 and log3 Click here to see answer by lwsshak3(6770)

 Question 578197: Given a starting population of 100 bacteria, the formula b=100(2^t) can be used to find the number of bacteria, "b", after "t" periods of time. If each period is 15 minutes long, how many minutes will it take for the population of bacteria to reach 51,200? i already know the answer is 135...but how do you get that? Click here to see answer by dfrazzetto(277)
 Question 578197: Given a starting population of 100 bacteria, the formula b=100(2^t) can be used to find the number of bacteria, "b", after "t" periods of time. If each period is 15 minutes long, how many minutes will it take for the population of bacteria to reach 51,200? i already know the answer is 135...but how do you get that? Click here to see answer by josmiceli(9819)

 Question 578477: find the value of x in this equation : log(x+3)+log(x-1)=0 Click here to see answer by KMST(1936)

 Question 579226: When a new game system first came out, it cost \$500. Over the next couple of years, however, the price fell by 5% each month. Write a function to find the cost, C, after m months. A)How many months did it take before the price of the game system fell to \$200? B)What was the cost of the game system after 2 years? SOLVE USING LOGARITHMS(: Click here to see answer by dfrazzetto(277)

 Question 579546: The expression ln (2e^3x) is equal to? a. ln 2+3x b. ln(2+3x) c. ln 6x d. ln 2+3 Click here to see answer by Tatiana_Stebko(1326)

 Question 579820: Please solve log base 3(X+1)=4 and e^x=5 and expand log base b 2x^2y^3. Thanks! Click here to see answer by stanbon(57984)

 Question 580034: Solve the equation 91n 3x = 81. Express the answer in terms of e Click here to see answer by Alan3354(31538)

 Question 580885: I need to solve two different logarithmic equations. 1) 2log10x=10 (the first 10 is the base ten) 2) 9 log 10 x-4 = 11 (the ten is also the base in this equation, and the x - 4 is the exponent) Click here to see answer by dfrazzetto(277)