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October 26, 2014

Search: Math - logs

Number of results: 94,211

Math
Logs are stacked up in apile as shown in the figure. The top row has 15 logs and the bottom row has 21 logs. How many logs are in the stack? a1= 1+14=15 an= 7+14=21 s1=(n/2)(a1+an) (n/2)(15+21) = 18 How do I figure out the n?
May 4, 2010 by Abbey(Please help)

math - natural logs
Find the EXACT solution to e^(1-x) = 4^x You must use logs, not just a calculator.
October 31, 2011 by BJ

math logs
solve 3^(2x+1) = 9^(2x-1) using base 3 logs
November 12, 2011 by Sejul

Precalculus
.5=e^(-20t) I am assuming this involves logs but we did't really learn logs. Anyone care to walk me thru with a calculator. Have the Ti-83
March 13, 2008 by Trevor

Maths (Logs)
1.Write the following equation without logs log y = mx+ c This would be y = 10^(mx+c) right? 2. Explain why this fits the exponential model (in other words, it can be written in the form y = a x b^x where a and b are real numbers).
April 7, 2008 by BP

math
Mr Logan can saw 8 logs in 3 hours. How many logs can Mr Logan saw in one hour?
August 15, 2012 by Andrea

Pre Cal (logs)
I need help with these logs 1: Log underscore4 16X 2: 2 Ln ( X(sqr. root)e 3:5^[2logUnderscore5(3x)] 4:log underscore2 ^[1280-logunderscore2 5) I don't understand how to do them thanks
March 30, 2008 by Deb

chem
"Yule logs are simulated wood logs make of compressed paper that burn with a red and green flame.How would you produce a similar yule log?"
July 9, 2008 by jennifer

Quantative Method
Generate your Unit transportation costs (in excel) 1. Ship construction logs from 8 provinces in Canada to 50 states in the U.S. Minimize total shipping cost. 2. Set up the demand in each state of the U.S. 3. Set up availability of logs in the 8 provinces of Canada
June 14, 2013 by Anita

chemistry
help required in calculating the pH value of a .84 mols per litre solution of sulfuric acid. I understand that pH = -log 10 (2x 0.84), I am not very experienced with logs and need assistance as to which keys to press on the scientific calculator in relation to the logs. thank ...
March 6, 2007 by ruby

more pre cal logs
sorry I am so lost I missed the class that talked about logs since my sister was in the hospital giving birth to a still born baby.... now I am all lost... Expand the log Ln 3sqrootx^2y/x+3 (the 3 is part of the sqroot not infront like the 3rd power) I hope that makes since
March 31, 2008 by Deb

math - logs
2 ln (x) = ln (20-x)
October 31, 2011 by Sebastian

math
solve with logs 3^(1-2x)=4^(x)
November 24, 2008 by kayla

Math - logs
the log(10^ -1)of 3.66 = of 9.86 = of -2.8 = thank you
January 19, 2013 by Needs log help

Logs-Algebra
How do you graph the following logs? f(x)=log5 (x-2) f(x)=log5 x-2 f(x)= log5 x f(x)=log5 (x+2)
October 23, 2007 by Jayme

math
how do i solve these logs? log1/2 (3x+1)^1/3= -2 3^(x^3)= 9^x
January 8, 2009 by kayla

Math 12 (Logs)
Solve: 3^(2a+3)=7^(a-4) Please Help and Thank you
April 15, 2012 by Anonymous

math- logarithms
how do i solve these logs? log1/2 (3x+1)^1/3= -2 3^(x^3)= 9^x
January 8, 2009 by kayla

math
How would I simplify this problem using logs? (25/16) -3/2
June 2, 2008 by Jenna

math
how do you solve for x using logs: [(a + b)^x]/b^x I am not sure of the steps to get there.
January 19, 2010 by David

Math
Could you check these pleas? Firewood usually sold by a measure known as a cord. A full cord may be a stack 8x4x4ft or a stack 8x8x2ft 10. what is the volume of a full cord? 8*4*4=(128ft) 11. A short cord or a face cord of wood is 8x4xThe lenght of the logs. What is the volume...
September 7, 2010 by TiffanyJ

math - logs
if logx3 = a and logx25 = b, determine an expression for logx(9/5).
December 10, 2009 by Cyn

Science
Which of the following materials will burn the fastest in open air? A. a log, two feet in diameter B. two logs, each one foot in diameter C. a pile of small splinters made from a two-foot diameter log D. Both logs and the splinters will burn at the same rate.
March 8, 2012 by Samantha

Science
Which of the following materials will burn the fastest in open air? A. a log, two feet in diameter B. two logs, each one foot in diameter C. a pile of small splinters made from a two-foot diameter log D. Both logs and the splinters will burn at the same rate.
March 12, 2012 by Samantha

math logs - please help
True or false: 2 ln x / ln 5 = ln x^2 - ln 5 for all positive values of x.
November 12, 2011 by Sejul

LOGARITHMS
HI THE QUESTION STATES THAT ONE SHOULD CALCULATE THE LOGS WITHOUT THE USE OF A CALCULATOR...OKAY MY PROBLEM IS THIS... 2 3 2log 8 + 2log 8 what should i do? i had come to the piont of... 4 5 log 8 + log 8 But what's to do now i dont know..Think u can help?... cheers michelle ...
October 25, 2006 by TIGGER

math
5 divided by (3-e to the -x power)=4 5/(3- e^-x) = 4 5 = 12 - 4 e^-x 4 e^-x = 7 e^-x = 7/4 e^x = 4/7 Take natural logs of both sides, x = ln (4/7) = -0.5596
December 8, 2006 by Anonymous

math
also a problem that i cant figure out is how to do inverses of logs f(x)= 2log(base2)X
March 2, 2012 by Diana

Math (logs)
In x = -3 find x. I worked it out like this e^inx= e^-3 then I got x = 1/e^3. Is that correct?
December 8, 2013 by Wilson

Logarithms
How do I solve this using logs? I am having a total math meltdown tonight! 10=2^10/n Thanks again!
January 9, 2008 by Math genius! Urgent!

Math
solve for x without using a calculator: log5(3^x) = log25(9^(1-2x)) I don't know how to get rid of the logs for this one. Help? Thank you!
November 15, 2009 by Momo

Math (check please)
Could you check these please? Firewood is usually sold by a measure known as a cord. A full cord may be a stack 8x4x4ft or a stack 8x8x2ft 10. what is the volume of a full cord? 8*4*4=(128ft) 11. A short cord or a face cord of wood is 8x4xThe lenght of the logs. What is the ...
September 7, 2010 by TiffanyJ

exponential and logarithmic graphs question
hi, i desperately need help solving this question: Find the values of A and k if the general equation of the graph shown is y=Ae^kx where the graph goes through the points (-1,-4) and (-2,-10) do i solve it using simultaneous equations? because i have attempted this yet failed...
March 21, 2007 by elle

math
How would you condense a logarithm expression into a single quantity if the logs have different bases?
November 20, 2012 by Jamie

MATH 1111
College Algebra help with logarithms! Ln (x-4) - Ln (x+1) = 16 How do I take natural logs?? it's a study guide question for our final exams
April 30, 2009 by Sammy

Math
1. Given the product law of logarithms, prove the product law of exponents. 2. Given the quotient law of logarithms, prove the quotient law of exponents. 3. Apply algebraic reasoning to show that a=b^(loga/logb) for any a,b>0 Please explain these to me. All I know is that ...
May 25, 2009 by Jus

Math logs
Solve the system of equations: y= (lnx)^2 + 2 (lnx^2) y = 3ln(1/x^2)+24 Im not sure what to do..
October 14, 2009 by Mike

Algebra 2
logs?
June 4, 2009 by Kay

Math
Which term is 13122? The geometric sequence is 2, -6, 18, -54 tn=ar^(n-1) 13122=2(-3)^(n-1) 6561=(-3)^(n-1) log6561=n-1log-3 You can't divide with negative logs, how do I isolate n?
January 4, 2010 by QQ

math. logs
anyone know how to solve this step by step? e^(3ln2)
September 28, 2008 by Kay

Math - logs
the log(10^ -1)of 3.66 = of 9.86 = of -2.8 = please help. (the 10^-1 is the subscript to log)
January 20, 2013 by Please help

calculus
Differentiate y=lnx You ought to have this memorized. y'=1/x for y= ln x dy/dx = 1/x This is the most basic and fundamental of log derivatives. If you are studying Calculus, and the topic is logs, I fail to understand why you asked that question. IS there a website that can ...
April 11, 2007 by quita

Exponents and Logs (Math)
Solve for x: 2^(-x+1) = 4(8^x) I try isolating the 4 but I can't seem to solve it correctly when using ln or log applications. The answer is supposed to be x=-1/4. Any help?
August 10, 2010 by Fred

Science
3. Which of the following conditions would likely cause the activation energy to be high? A.atoms are close together B.the temperature is hot C.atoms are not close together * D.a catalyst is present 4. Which of the following materials will burn the fastest in open air? A.a log...
March 3, 2013 by Cassie

natural logs
Solve for x: ln(x+1)+ 2 = x^2 8x + 12
December 19, 2008 by Anne

natural logs
solve for x. xe^x = 9
March 12, 2009 by kaitlyn

logs
How do you solve: log (1/3) 1 ?
November 1, 2010 by Ali

algebra: logs
Log3x=4
December 10, 2012 by Ruth

Precalculus
This is for solving exponential/logarithmic functions: (This is a base e Logarithmic function I would assume): e^(4x)/10 =4^x-2 ? I understand the properties of logs for the most part, but I have a hard time figuring out the step-by-step process on how to solve exponential/log...
December 11, 2012 by Sarah

maths
solve for x 8=6^x using logs
November 12, 2007 by walter

precal
logs 9^(2x-5)=27(x+4) and 3log(underscore4)(2x-1)=15 Thank you
March 31, 2008 by Deb

precalculus logs
what is the domain of f(x)=-ln(-x) and the inverse
November 11, 2011 by adly

algebra
solve e^x / 3 = 5^x using logs.
December 3, 2011 by Anil

LOGS (ALGEBRA)
FIND THE INVERSE: f(x) = 10^(5x+3) - 10 f^-1(x) =
May 5, 2014 by Marty

Precalc
if you have how do u do 2^2x - 2^x - 6 =0 (calc)how do u do it? using logs??
January 26, 2009 by Spencer

Logs
log6(x+7)−log6x=2 Solve for x
January 10, 2010 by Nina

logs 3
How do you create a table to graph log (3/2) x ???
November 1, 2010 by Ali

calculus
Solve the equation 14=65(19)x for x using logs.
January 31, 2012 by britt

Math
I understand generally how to solve, by taking natural logs and the the derivative, but i am confused by the presence of the 3 in front... if f(x)= 3(sin(x))^x, find f'(1) should i move 3 to the y side or take the natural log of it? Thanks!
November 5, 2010 by Tokey

physics
You are planning to build a log cabin in northern Minnesota. You will pull the logs up a long, smooth hill to the building site by means of a rope attached to a winch. You need to buy a rope for this purpose, so you need to know how strong the rope must be. Stronger ropes cost...
September 27, 2012 by nate

solving for x math
2e^(4x^2)=3 how do i solve for x. do i use the ln methode because i don't know how to do that. by calculator, i got x=.168 but i don't know how to show my work. please help me solve for x. Take natural logs of both sides. ln 2 + 4 x^2 = ln 3 4 x^2 = ln (3/2) = 0.40547 x^2 = 0....
December 5, 2006 by david

Math
How would you solve a problem like this with logarithims? I tried to start a couple of different ways but I kept getting stuck. Do you take the logs of both sides right away or do you do something else first? 17c^2/3 = 44
January 15, 2008 by Anonymous

Logs
Solve for x. log5x=(1/2). Express the answer to the nearest hundredth.
May 8, 2010 by Sue

Algebra
express log (3x^5y^3/z^3) as the sum and difference of logs with no exponents.
December 8, 2010 by peggy

Math-LOGS
Express x in terms of a,b and c. log x = 1/2 (log a + log b - log c) Please solve and explain how to do this type of problem, thank you!
December 21, 2009 by Jess

Math Repost (Logs)
.704=log(100/x) I tried this 10^.704=10^(100/x) But i not sure what to do now?
February 21, 2010 by Neo

natural logs
solve for x. xe^x = 9 please help i am stuck. i keep going in circles.
March 12, 2009 by kaitlyn

logs
log (base 8) 1 = ??? I know it's 8 to some power gives me 1, but I can't figure it out.
November 6, 2011 by help me

math
If you can cut three logs in six minutes. How many minutes will it take to cut 8? 16 is not the answer.
January 22, 2010 by kimberly

Math - logs
I need help solving this because it involves 2 bases: log (base 2) [log (base 5) 25]= ???
October 29, 2011 by Anil

Precalc (LOGS)
1. (e^x - 1 )/(x^2 - 1) < 0 2. The inverse of ln (3 - x) ? 3. Simplify x^3 - 3x^2 + 2 = 0 Any help would be GREATLY appreciated. Thank you so much for your time.
August 4, 2008 by Joe

social studies
mahogany logs from central America sometimes wash up in scotland. how do you explain this?
February 6, 2011 by isis

math- exponents and logs
5,000=55.66 (1.114)^x (i.e. What is x?) ln 5,000= x ln 55.66 1.114 I keep getting 2 point something, but does this make sense? My calculator display looks like this: ln 5000/ln (55.66)(1.114)
March 4, 2013 by Phoebe

Math - Logarithmic
Is the following correct when restating logs with variables to exponential? Log: log_a(a^3) --- base = a Exp: a^3 = a I know when dealing with real numbers, this is what you do: Log: log(10^5) Exp: 10^5 = 100 000
December 13, 2007 by Anonymous

math
the population of Smallville in the year 1890 was 6250.assume the population increased at a rate of 2.75% per year. predict when the population reached 50,000 I'm not suppose to use logs to find the answer :(
January 14, 2013 by hana

misplaced nodifier
we finally found the fire extinguisher we had been hunting for behind a pile of logs
September 24, 2011 by rasheda

math
I need an expression written for the following logs using "sum, difference, or multiple of logarithms." a) log[base(2)] ((x^2) - 9)/(x^3))^3 b) log[base(a)]5a^4 Hopefully they are clearly written. thanks. -roberto
April 8, 2013 by Roberto

math-logs
1. logaB = 2 and logbC = 4, evaluate logcA *the lowercase letters are bases ie. log(base a)B 2. solve for x: (log(base 2)x))^3 = log(base 2)x
February 13, 2011 by randy

Math
What is the real value of x in the equation log(subscript 2)24-log(subscript 2)3=log(subscript 5)x? I really cannot remember at all how logs work. I know the answer is 125 but have no idea how to get there. Thanks in advance.
November 17, 2007 by Natalie

Math - logs
log_3(2x - 1) = 2, Find x. Here's what I've done: log_3(2x) * log_3(1) = 2 log2x/log3 * log1/log3 = 2 trial and error... log2 (2*1.4)/log3 * 0 = 2.03... x = 1.4 I think I did it wrong because anything that multiplies with 0 gives you 0...
January 24, 2009 by Anonymous

algebra 2
find the points of intersection of the following algebraically y=2^x + 4^x y=2^x+1 - 4^x+1 I set them equal to each other but not sure if you use logs or what to solve it
August 10, 2010 by jonathan

Natural Logs
When you are subtracting functions with ln, I know you divide the numbers after ln, but what do you do with constants in front of ln? For example, I'm currently dealing with: 4ln8 - 4ln3 Thanks!
March 23, 2009 by Hannah

trigonometry
(3^m)(5^(m+1))=12^(2m-1) not sure how to solve this but I think you use natural logs? I'm just stuck because the first two are multiplying and not adding and we didn't go over this
August 11, 2010 by Teddy

language arts
Three Indian elephants patiently towed the logs that had just been cut. is this an adverb clause
March 3, 2011 by Anonymous

Maths-Logs
when writing log b to base a, (log-a(subscript)-b), can a be less than 0?
November 23, 2007 by xX_Supaman_Xx

Calculus
Solve for x using logs. 4 * 16^x = 10 * 11^x Do you start by multiply 4 times 16 then 10 times 11, and then what? Or am I completely wrong?
August 23, 2008 by George

math
How do I work out Logs on my calculator to do the sum Log6x=0 or Logx64=2. I have a sharp EL-EL531WH Advanced D.A.L. What is x? This is how I work this one out on it, Log2^16=4 I do Log big number 16 /Log small number 2 = 4.
November 11, 2009 by jo

math
given that c is the logarithm of x in base a, and d is the logarithm of x in base b, find the general statement that expresses the log of x ib base ab, in terms of c and d. I couldnt include subscripts, but here are what the logs should look like: loga_x=c ; logb_x=d...logab_x...
March 16, 2008 by Liz [please... urgent!]

Pre Calculs
The pH of a chemical solution is given by the formula pH = -log10 [H+] where [H+] is the concentration of hydrogen ions in moles per liter. Values of pH range from 0 (acidic) to 14 (alkaline). (a) what is the pH of the solution for which [H+] is 0.1? (b) What happens to pH as ...
October 10, 2006 by Erica

general physics
What is the smallest number of whole logs ( = 725 kg/m3, radius = 0.0556 m, length = 3.80 m) that can be used to build a raft that will carry four people, each of whom has a mass of 73.0 kg?
July 20, 2013 by please help with these practice problems

Math
Log(base a)(a^4*b)-Log(base a)(a*b) is the same as a)4 b)3 c)3a d)a^3 I got the answer as d since subtracting logs with the same base is division. However, the answer key saids its b, Can someone please help me with this?
January 21, 2010 by ALan

math
Given: f(x)=log 5 x what is the value of f(125) and f(1/25)? Totally lost! I assume you mean f(x) = log (5x), not log 5 * x. If this is the case, then f(125) = log 600 and f(1/25) = log (1/5) If the base of the logs is 10, then log 600 = 2.778..
January 13, 2007 by Hannah

Algebra
Solve the equation. 2log3 y = log3 4+ log3 (y+8) Here's what ive got take out the logs and say y^2= 4+ y +8 which simplifies to (y^2)-y=12 how do i simplfy the y?
April 30, 2011 by Kenya

Physics(Please help)
What is the smallest number of whole logs ( = 725 kg/m3, radius = 0.0800 m, length = 3.60 m) that can be used to build a raft that will carry four people, each of whom has a mass of 60.0 kg? I do not know how to start this.
June 21, 2012 by Hannah

Informantion Tech
Which of the Windows server 2003 events logs contains information about the events generated by components such as services and devices?
August 28, 2008 by Yvonne

logs 2
How do you solve log(5) 20 + log (5) 10 - 3log(5) 2?
November 1, 2010 by Ali

physics-intensity
The intensity of a certain sound wave is 6 W.cm2. if its intensity is raised by 10 decibels, the new intensity (in W/cm2) is : a. 60 b. 6.6 c. 6.06 d. 600 E. 12 You can calculate this if you wish using logs, but you can do it in your head: 3 db means double power, 6 db ...
August 7, 2007 by Damon

Alegbra (logs)
Please help, I need help on these two problems. Solve the equation. log3(x − 16) = log3(9x) e^1 + ln(7) It appears on the homework that the ln(7) is written like this ^ln(7) but I am still stuck on it. Thanks!
April 22, 2013 by Karl

College algebra
Use the properties of logs to write the expression as one log: 8log(base 5)4th square root of x minus 4log(base 5) x
May 12, 2013 by Taylor

Algebra 2
Can someone please explain to me how to solve logarithmic equations? Some examples are: -5=log2X 3^5x+1= 40 and log6X+(log6)7=(log6)35 I hope that makes sense because logs are hard to type.
April 18, 2008 by JaneLee

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