Questions on Algebra: Logarithm answered by real tutors!

Tutors Answer Your Questions about logarithm (FREE)

Question 33575: log(x)^2=2logx This one is also true right? Thank you for you help.
Click here to see answer by stanbon(57374)

Question 33575: log(x)^2=2logx This one is also true right? Thank you for you help.
Click here to see answer by Nate(3500)

Question 33616: I don't understand what ln(natural log) means. This is what I have so far: 15,000 = 10,000e ^.10t
15,000/10,000 = 10,000e^.10t/10,000
15000/10000 = e^.10t
1.5 = e ^.10t
ln(1.5) = ln(e ^.10t)
Thanks,
Joey Widener
Click here to see answer by Nate(3500)

Question 33620: log(x^2)=2logx This one is also true right? Thank you for you help.

Click here to see answer by elephantsize(7)

Question 33639: log2 8=x
x is equivalent to 3 because 2*2*2=8 Is this how you do this?
Click here to see answer by sarah_adam(201)

Question 33639: log2 8=x
x is equivalent to 3 because 2*2*2=8 Is this how you do this?
Click here to see answer by Nate(3500)

Question 33638: Explain the diference between a logarithm of a product and the product of logarithms and give examples of each

Click here to see answer by Nate(3500)

Question 33619: 10^2logx=2x HELP I need to know if this is true or false. Does anyone know? Thank you

Click here to see answer by Nate(3500)

Question 33669: I'm not sure how use my calculator
e ^ -1.83 = 0.8327
or
e ^ -1.83 = 0.1604
Click here to see answer by stanbon(57374)

Question 33657: Suppose that a student has 500 vocabulary words to learn. If the student learns 15 words after 5 minutes (this means L(5)=15 for the function L(t) ) , the function L(t) = 500(1− e−0.0061t ) approximates the number of words L that a student will learn after t minutes.
a) How many words will the student learn after 30 minutes?
b) How long will it take the student to learn 300 words?
Click here to see answer by stanbon(57374)

Question 33676: log(2x)=2logx I believe this one is true. Am I right? Thank you.
Click here to see answer by venugopalramana(3286)

Question 33675: ln(1/x)+lnx=0 Is this one true or false? Thank you for your help.
Click here to see answer by venugopalramana(3286)

Question 33674: log(10x)^2=2+2logx This one is false right? Thank you for helping me.
Click here to see answer by venugopalramana(3286)

Question 32682: For each of the following equations either prove that it is correct (by using the rules of logarithms and exponents) or else show that it is not correct (by finding numerical values for the variables that make the values of the two sides of the equation different).
log (x/y) = log x/ log y
log x - log y = log (x/y)
log (2x) = 2 log x
2 log x = log (x^2)
log x+1 / x+3 = log (x+1) - log (x+3)
log (x square root x^2 + 1) = log x + 1/2 (x^2 +1)
log (x^2 +1) = 2 log x + log 1
Click here to see answer by venugopalramana(3286)

Question 33712: Express as a single logarithm and, if possible simplify
log(x^3-8)-log(x-2)
Click here to see answer by ntnk(54)

Question 33728: solve the logarithmic equation
lnx-ln(X-4)=ln3
Click here to see answer by Nate(3500)

Question 33729: Solve using any method
(e^3x+1)^2/e^4=e^10x
Click here to see answer by stanbon(57374)

Question 33571: log(10x)^2= 2+2logx Is this right? I need to know if it's true or false. Thank you for your help.
Click here to see answer by Prithwis(166)

Question 33842: 2^log2^5-log2^6
Click here to see answer by stanbon(57374)

Question 33840: Solve: 3^x * 9^-x =27^x
Click here to see answer by stanbon(57374)

Question 33846: Question:

The loudness of sound is based on intensity level measured in decibels using a logarithmic scale and is relative to (a ratio of) the weakest sound the ear can hear.
.Include the following items in the answer:
The formula for measuring sound.
Pick a specific sound, give the decibels of the sound, and explain what this measurement means.

Click here to see answer by Paul(988)

Question 33989: 2 log(x+2)+log4 = log x + 4 log3
Click here to see answer by longjonsilver(2297)

Question 34026: i am having a hard time answering these problems.
1. x=8log(100,10)
2. logx (1/16)=-2
3. log(x)=square root log(x)
Click here to see answer by xcentaur(357)

Question 34047: i need help in solving these questions, i do not understand them.
Click here to see answer by xcentaur(357)

Question 34047: i need help in solving these questions, i do not understand them.
Click here to see answer by elephantsize(7)

Question 34223: How would you go about solving these problems
2e^(x+1)-7=3

5log32^(x+1)=3 (note: 32 is the base)
Click here to see answer by venugopalramana(3286)

Question 34222: I feel stupid asking this question but, Is there a differnce between a logarithm of a product and the product of a logarithm? If there is a differnce can you explain it to me?
Click here to see answer by venugopalramana(3286)

Question 34221: I am so lost with this, I don't even understand where to begin. We are supose to find each value of x. Here is the problem
log2 8=x The 2 is supose to be small and at the bottom of the g. Can someone please help me?
Click here to see answer by venugopalramana(3286)

Question 34278: What is the derivative of ln(ln(x))?
Click here to see answer by Paul(988)

Question 34286: 1. x=8log100(10)
Next two need to be written as a single expression with coefficient.
2. logaK-logbM-logbA
3. logb(2y+5)-1/2logb(y+3)
Click here to see answer by stanbon(57374)

Question 34336: I am suppose to solve this with out a calcutlator:

the sqrt kinda throws me off, i have a tutor who tried to explain it but they were also confused on what exactly to do. here is what we were trying:

cancles out
answere:
??????
we know we are going in the wrong direction with this but are very lost! please help! thanks!
Click here to see answer by venugopalramana(3286)

Question 34389: I need help.
How do you evaluate the following
log base is 12 554?
Click here to see answer by lyra(94)

Question 34390: express as a single log
logbx^6 y/w^2

Click here to see answer by lyra(94)

Question 34398: I am not sure how to solve these problems
Click here to see answer by tmarienatree(17)

Question 34362: I would really appreciate if someone could help me these are the only problems that i didnt know how to do if someone could help me i would appreciate it
Solving Exponential Equations Using Logarithms round to 3 decimal place
2x = 30
5x - 1 = 3x
3.53x + 1 = 65.4
16x - 4 = 33 - x
7x - 2 = 5x

Click here to see answer by mukhopadhyay(490)

Question 34436:
Click here to see answer by mukhopadhyay(490)

Question 34436:
Click here to see answer by dimndskier(8)

Question 34433: 21log(x)to the 1/3 power + log x squared- log25
This is not from a textbook
Click here to see answer by longjonsilver(2297)

Question 34518: how do I find the inverse of f(x)=-2x+7?
Click here to see answer by stanbon(57374)

Question 34520: solve this exponential equation to the nearest hundreth
2e^4x=8
help :(
Click here to see answer by Earlsdon(6287)

Question 34520: solve this exponential equation to the nearest hundreth
2e^4x=8
help :(
Click here to see answer by stanbon(57374)

Question 34359: Evaluate ln e
Click here to see answer by rapaljer(4667)

Question 34528: Solve:
8^(4x-3)= 1/16, find the exact answer.
Click here to see answer by venugopalramana(3286)

Question 34526: So here is the question I've been mulling over..
10^3log(x)= 1/9
Log is base 10..
Thanks a million for any help!
Click here to see answer by venugopalramana(3286)

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