51 Answered Questions for the topic Logs

09/30/18

#### How do I condense log - log + log

I understand the rules of logarithms but am confused as to what order to go about condensing this

07/18/18

#### Expand the expression log(z^3/sq. rt. x^5y). Each logarithm should involve only one variable and should not have any radicals or exponents.

Please Use properties of logarithms to expand the expression. log(z^3/sq. rt. x^5y)Each logarithm should involve only one variable and should not have any radicals or exponents.You may assume that...
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04/04/18

#### a rock has a half life of 2.3 billion years, 40% element and 60% lead, how old is the rock

A certain element has a half life given in cell B3, meaning that in that number of years, half of the element has turned to lead. You find a rock with the percent of the element and percent of lead...
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03/08/18

#### Solving Log2(2x)+log2(x+2)>log2(16) algebraically

Solving Log2(2x)+log2(x+2)>log2(16) algebraically

12/24/17

#### sin theta tan^2 theta (2sin theta + 3) + tan^2 theta = 0

logs edexcel c2 iygb paper z question 6

12/12/17

#### Solve the following

1.find the value of Of each of the following, giving your answer an integerLog64+Log692.Let Log3P=6 and Log3Q=7Find Log3(P/Q) By expanding the logarithm 3.Solve the equations below using exponents...
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11/05/17

#### Twice a first number decreased by a second number is 6. The first number increased by four times the second number is 39. Find the numbers

Twice a first number decreased by a second number is 6. The first number increased by four times the second number is 39. Find the numbers

10/17/17

#### Use the rules of logarithms to contract the following expression into a single logarithm (if necessary), then solve for x

ln(4)-ln(x)=-0.15

04/16/17

#### Some logarithms. Falling behind and not really sure how it works completely.

So, in all, I'm really just asking how I would use log in general. (Please answer in a 'for dummies' format please! :) Not exactly the best with the vocabulary!) Due to some research, I've learned...
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10/09/16

#### If you invested $1000 in an account paying an annual percentage rate of 12%, compounded daily (based on a bank year of 360 days), how much would you have in you

You have to use the formula y=P(1+r/n)^nt to solve it

08/02/16

#### In this question each stage of your working must be shown and must not contain a logarithm. Simplify 1/2 log2 36+ 2 log2 8 - log2 24.

In this question each stage of your working must be shown and must not contain a logarithm.Simplify 1/2 log2 36+ 2 log2 8 - log2 24.

07/20/16

#### Logarithms, what am I doing wrong ?

If logx=5 , logy=2 and log z= 3 , find the value of log [ (xy^3)/(z) ]?
I substituted the numbers inside the brackets then condensed it. I got an answer of 10. But the right answer is 8...
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07/18/16

#### Graphing a logarithmlog

y=(log3X) -1
When finding the table of values, I removed the brackets and did 3y =x-1 but ended up with a different set then the one in my book.
Also , if I were to convert y=3^x+1 , its...
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07/17/16

#### Really need help understanding this log equation

Hello, Im trying to solve for x. Its been days now I try to understand but I cant seem to. I understand how to solve for x for my other problems but this one is just really tough for me. So it says...
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07/16/16

#### How do I express this as a single logarihm (condense) ?

1/2Log(x) + 3/2Log(2y) — log(x2y)
Can you please show me steps? I tried at least five times and the book says the answer is with a square root but I dont know how to get there.
The first...
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07/15/16

#### Graphing logs

Hi, Im confused by the brackets in this log so Im not sure how to graph it.
y=[ (log3(x)] -1

07/15/16

#### Solving for x in logs with different bases

Hi, Im trying to solve for x for Ln(x)—log(x)=1
The first thing I did was use change of base property. After this is where Im totally confused on solving.

07/15/16

#### Expanding logs

Hi, I just want to know if if my answer is correct.
log n√(100x3/ym)
* Instead of it being squared, its an n. Also (100x3/ym) is under one big root*
The answer I got is :
n+...
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07/15/16

#### Logs, solving for x

Hi,I need help solving for x for :
logx2 (101) = logx+1 (101)
The bases are not the same so im guessing you have to use change of base formula right? Im not sure though how to use it for...
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07/14/16

#### Absolute value when expressing in terms of simple logs

log5 [ (a2b3 )/(25) ] . Its log base 5.
My question is when there is an even number you have to write it with the absolute value sign right?

07/14/16

#### Evaluating these two logs

Hi, I need help understand how to use log identities to solve
a) 5 2log53

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