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Question 80153: I'm having issues with logarithms. I'm studying for my final and this is the first question on my review:
log(subset x)(8/125)=3
I began by applying the quotient rule and came up with:
log(subset x)8-log(subset)125=3
I thought I would rewrite it as log(subset x)(8x125)=3, but I have no clue.
I believe I would know what to do if there weren't constants in the equation, but I cannot figure this out.
My answer options are:
a) 2/5
b) 5/2
c) 3
d) 8
Thank you so much!
Click here to see answer by tutor_paul(424)

Question 80157: express the solution in exact form
ln(-x)+ ln 4=ln(3x-9)
Click here to see answer by stanbon(26252)

Question 80156: log(2+x)-log(x-2)=log 5
Click here to see answer by tutor_paul(424)

Question 80155: express the solution in exact form
ln(-x)+ ln 3=ln(3x-9)
Click here to see answer by stanbon(26252)

Question 80251: log 4x= log 5+log(x+1)
Click here to see answer by tutor_paul(424)

Question 80249: Write in Logarithmic form
(4/11)^-3=1331/64
Click here to see answer by stanbon(26252)

Question 80364: I would like a solution to how it is done to evaluate each expression:
log of 2 (log of 2, 4). I do know the answer is 1. Please explain .
Thank you,
Charles
Click here to see answer by stanbon(26252)

Question 80371: I would like a solution to how it is done to evaluate each expression:
log of 3 with the square root of 3. I do know the answer is 1/2 (from the back of my text book's answers to the problem), but the log calculator on this web site had the answer as 0 because it was needed 0 divisions to get to 1. Please explain . My question is written below
___
log _/3
3
Click here to see answer by stanbon(26252)

Question 80373This question is from textbook Algebra for college students
: I would like a solution to how it is done to evaluate each expression:
-2+ 1n e^3. I do know the answer is 1 (from the back of my text book's answers to the problem), but the log calculator on this web site had the answer as 0 because it was needed 0 divisions to get to 1. Please explain .
This question is from textbook Algebra for college students

Click here to see answer by stanbon(26252)

Question 80380This question is from textbook Algebra for college students
: Find the inverse of the function f(x)= -3x-6. I know the answer is
-6-x
f-1(x)= ------
3

I only need the solution on how it was figured out.This question is from textbook Algebra for college students

Click here to see answer by bucky(1732)

Question 80396This question is from textbook Algebra for college students
: Solve the equation: log with a base of 9 x = 5/2. The answer is 243. Please explain how the answer was solved.This question is from textbook Algebra for college students

Click here to see answer by josmiceli(3003)

Question 80370: I would like a solution to how it is done to evaluate each expression:
log of 2 (0.5). I do know the answer is -1 (from the back of my text book's answers to the problem), but the log calculator on this web site had the answer as 0 because it was needed 0 divisions to get to 1. Please explain .
Thank you,
Charles
Click here to see answer by josmiceli(3003)

Question 80394This question is from textbook Algebra for college students
: evaluate the expression: log with a base of 2 with the argument (0.5) The answers in the back of my book is - 1. please explain the solution.This question is from textbook Algebra for college students

Click here to see answer by tutor_paul(424)

Question 80382This question is from textbook Algebra for college students
: Find the inverce of the function f(x)= 2/3x- 3/5.
I know the answer is f^-1 (x) =3/2x + 9/10.
It is really important to me to know how it is done. I need to know the solution. ThanksThis question is from textbook Algebra for college students

Click here to see answer by tutor_paul(424)

Question 80375This question is from textbook Algebra for college students
: Find the Inverse of the function f(x)= 2/3x -3/5.
I know the answer is f-1(x)= -6-x
-----
3

I only need to know the solution on how it was figured out.
Thank you.This question is from textbook Algebra for college students

Click here to see answer by bucky(1732)

Question 80372: I would like a solution to how it is done to evaluate each expression:
-2+ 1n e^3. I do know the answer is 1 (from the back of my text book's answers to the problem), but the log calculator on this web site had the answer as 0 because it was needed 0 divisions to get to 1. Please explain .

Click here to see answer by bucky(1732)

Question 80404:
Find a in terms of b, given that
log4(a b2) = 3
Note that, in validating your answer, Maple may display your answer in a slightly different (but nevertheless equivalent) form to what you might expect.
Click here to see answer by stanbon(26252)

Question 80403:
A certain radioactive isotope decays at a rate of 1% per year; 3.4 kilograms of this isotope are produced in a particular industrial process. How much remains undecayed after 22 years?
Click here to see answer by stanbon(26252)

Question 80419: Solve for x
(1/7)^x=49
Click here to see answer by josmiceli(3003)

Question 80419: Solve for x
(1/7)^x=49
Click here to see answer by Earlsdon(4898)

Question 80425This question is from textbook Algebra for College Students
: Determine log5 632 to four decimal places
Page 584 Chapter 10This question is from textbook Algebra for College Students

Click here to see answer by stanbon(26252)

Question 80417:
I am require $11,000 in two years to return to college to get an MBA degree. How much money should I ask my father for now so if I invests it at 9% interest compounded continuously, I will have enough for school? Round answer to the nearest dollar amount.
Click here to see answer by stanbon(26252)

Question 80430: Logarithm problems are so confusing to me. How would I solve, or even actually type the correct problem? I have a problem: log10^7 = log10^x - log 10^2, and am to solve for x. I am so lost. Please help me with this.
Click here to see answer by stanbon(26252)

Question 80453This question is from textbook Algebra for college students
: Solve the equation: log x + log (x + 48) = 2
I know the answer is 2 from the answers page.
I need to know how the solution was solved.
Thank you.This question is from textbook Algebra for college students

Click here to see answer by tutor_paul(424)

Question 80458This question is from textbook
: Solve the equation: 1n x = 1n 2 + 1n (3x - 1)
I know the answer is 2/5 from the answers in the back of the book.
I need to know how the solution was solved.
I really appreciate your help.
This question is from textbook

Click here to see answer by bucky(1732)

Question 80536: why is the logarithm of 1 with base b is 0.
Click here to see answer by jim_thompson5910(13785)

Question 80455This question is from textbook algebra for college students
: Solve the equation: log x + log (x + 48) = 2
I know the answer is 2 from the answers in the back of the book.
I need to know how the solution was solved.
This question is from textbook algebra for college students

Click here to see answer by ankor@dixie-net.com(6689)

Question 80711: Hello, can you help me with the following review problem?
Let logb A = 4 and log B = -3. Find logb AB.
Sorry, I am terrible with this. Thanks for your help.
Click here to see answer by dolly(163)

Question 80759: Hello I have posted this before but no reply could someone please help!
Describe and explain how you could use the graph of f (x) = 2^x to obtain a decimal approximation for (the square root of 2) .
Click here to see answer by dolly(163)

Question 80764: Could someone please explain and give an example on how to solve an exponential equation when both sides can be written as a power of the same base. So that I may get a better understanding.Thank you all!
Click here to see answer by stanbon(26252)

Question 80760: HELP HELP HELP!!! The formula S = C(1 + r)^t models inflation, where C = the value today, r = the annual inflation rate, and S = the inflated value t years from now. Use this formula to solve and round answer to nearest dollar amount.
If the inflation rate is 3%, how much will a house now worth $110,000 be worth in 5 years?

Click here to see answer by dolly(163)

Question 80792: Please help! Final is on Monday.
Here is the problem I am stuck on:
(2/5)^x = 7^1-x
I came up with ln7/ln(2/5)+ln7 = 1.890 but my roomate keeps coming up with something different. Am I right? Thank you so much.
Click here to see answer by jim_thompson5910(13785)

Question 80761: Please HELP HELP!!! Please help explain and show what is the decibel level of a normal conversation,(square root of 10)- 3.2 x watt per meter^2?
Click here to see answer by bucky(1732)

Question 80796: Solving systems of equations using matrices:
4x + y = 7
-5x - y + z - w = 1
z+w = 7
I have z = 7 and know that w is any real number so far but am stuck solving for x and y. Help please.
Click here to see answer by Edwin McCravy(2920)

Question 80812: What is the inverse equation for f(x)=5x-5? and what is the inverse equation for y=x-6/3?
Thank you
Click here to see answer by stanbon(26252)

Question 80892: ASAP HELP!(^)I use this symbol to represent exponents
I have a question, if the loudness level of a sound, D, in decibels, is given by the formula D= 10 log (10^12 I) where I is the intensity of the sound, in watts per meter^2. Decibel levels range from 0, a barely audible sound, to 160, a sound resulting in a ruptured eardrum. What is the decibel level of a normal conversation, 3.2 x 10^-6 watt per meter^2?

Click here to see answer by jim_thompson5910(13785)

Question 80987: for what values of x is :
2 ln (x-1) > e^(x-4) - 2

Click here to see answer by stanbon(26252)

Question 80987: for what values of x is :
2 ln (x-1) > e^(x-4) - 2

Click here to see answer by Edwin McCravy(2920)

Question 81114: ^ = exponent is being used. / = represent fraction being used
9^x = 1/27 please show by expressing each side as a power of the same base and when equating exponents.
9^x = 1/27

Click here to see answer by stanbon(26252)

Question 81111: How do you explain how to do this problem and solve, thanks.
4 In x + 7 In y – 3 In z
Click here to see answer by stanbon(26252)

Question 81116: Help with writing equation in its equivalent exponential form.
6 = log(low)2. 64
6= log2 64 (the number 2 is suppose to be in the bottom right hand corner.
Click here to see answer by stanbon(26252)

Question 81388: I am taking an online electronics course and I am stumped on decibel/logarithm section relating to amplifiers. My problems deal in power or voltage gain, and levels. Here are 2 examples that I cannot solve. (1) A power amplifier has a gain of 26dB, and an input of 1 volt. What is the voltage level? (2) An amplifier has a voltage gain of 60dB, the input is 10 microvolts, what is the output? I have a couple formulas, and I know the answers, but I can't figure out how to get the answers from the formulas. The answer to problem one is 20, and the answer to problem 2 is 10. Here are the formulas:
Gain= signal out/signal in
dB= 10 x log(base 10) (W out/ W in)
dB= 20 x log(base 10) (V out/ V in)
Output voltage= input level x gain ratio
I need a very detailed expression as to how to solve these problems. I have looked in two textbooks for further explanation, but I cannot find the solutions.
Thank you so much if you can help!!!!

Click here to see answer by bucky(1732)

Question 81524This question is from textbook
: I would like to know how you find the following: log 1/16
2 This question is from textbook

Click here to see answer by mathdoc316(9)

Question 81608: A person buys a cup of coffee and drinks it in the store. The temp of the coffee y (in F degrees) is given by y=70 +137e to the power of -0.06t. t=time in minutes.a:What is the temp of the coffee when the person bought it? b:If the person will begin drinking the coffee when it reaches 180 degrees how much time must he wait after buying it? Thanks so much I am pulling my hair out
Click here to see answer by stanbon(26252)

Question 81611: How would you write and exponential function whose graph passes through (0,0.4) and (2,6.4)?
Click here to see answer by stanbon(26252)

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