442 Answered Questions for the topic Logarithms

Logarithms Story Problems

11/28/16

logarithms
The population N(t) (in millions) of a country t years after 1980 may be approximated by the formula N(t) = 211e0.0109t. When will the population be twice what it was in 1980? (Round your answer to... more
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11/26/16

Logarithms
Rewrite as a single logarithm:   2log5(A) - log5(B)+(1/3)log5(C)-5log5(D)   thank you for all the help!  
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Logarithms Exponential Decay

11/23/16

An endangered frog species has a population of 10 000.
An endangered frog species has a population of 10 000. Biologist estimate that the stock is decreasing at 3% per year. At this rate, approximately how many years will it take before only 80% of the... more
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Logarithms Exponential Decay

11/23/16

If the half-life of sodium-24 is 3.1 hours, then the time it takes sodium-24 to decay from 148 grams to 5.2 grams is?
If the half-life of sodium-24 is 3.1 hours, then the time it takes sodium-24 to decay from 148 grams to 5.2 grams is?
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Logarithms Exponential Growth

11/23/16

A strain of bacteria grows exponentially
A strain of bacteria grows exponentially. Immediately after 2 hours there were 1000 bacteria, and immediately after three hours there were 5000 bacteria. If no bacteria die, then the time it takes... more
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11/20/16

Log of letters
Given that a=c3 and b=√c ,  evaluate logab  
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11/09/16

Solve the log equation below.
log3(5x+1)=4
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Logarithms Math Math Question

10/31/16

How do you get ip from log(-1)?
According to Wolfram you can somehow get iπ from log(-1), how?https://www.wolframalpha.com/input/?i=log(-1)
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Logarithms Math Math Help

10/31/16

What is log(BASE-1)(-1)
Is it 1 or is it 2x+1? There are a couple ways of solving it, either by change or base which will give you one, or converting it into exponential form which gives 2x+1. Which one is correct?
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10/24/16

125^x + 5^(3x+1) = 400
I've been stuck on this forever. I don't understand how to solve it with multiple terms with different bases. I have to solve for x
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Logarithms

10/15/16

List the steps you would take to solve for "x."
log39 + log32x2 = log3162    I need to know how to solve this step by step so I am able to do other similar questions on my own. Thanks for the help :)
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Logarithms

10/13/16

n=250e^kt n=375 t=7, if n=750 what is t?
Solve for T, using natural log please!!
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Logarithms

09/27/16

0.475= 2-[log(%)] How do i get the percentage?
Absorption (A) = 0.475 %= dilution   Equation is    A= 2-[log(%)]
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Logarithms

09/22/16

2logb(x)+3logb(y) condense as much as possible
Condense as much as possible
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Logarithms

09/22/16

4 ln(x+6)-3ln x condense
Use properties to condense
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Logarithms

09/22/16

4=log2(16); 2=log3(x); 5=log b(32) write each equation in it's equivalent exponent form
write each equation in it's equivalent exponent form
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Logarithms Math Calculus Equations

09/21/16

Why is ln(e+5) = lne + ln5 false?
You can't distribute the natural log? I don't understand.
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Logarithms

09/19/16

8^x + 3 = 16^x - 1
Solve the exponential equations by expressing each side as a power of the same base and then equating exponents
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Logarithms

09/19/16

e^x + 1 =1/e
Solve the exponential equations by expressing each side as a power of the same base and then equating exponents
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Logarithms

09/19/16

125x = 625
Solve the exponential equations by expressing each side as a power of the same base and then equating exponents
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Logarithms

09/19/16

3 ln x + 5 lny - 6 ln z condense and evaluate
condense logarithmic expression and evaluate
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Logarithms

09/19/16

4 ln(x + 6) - 3 ln x condense and evaluate
condense logarithmic expression and evaluate
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Logarithms

09/19/16

1/2 In x + In y condense and evaluate
condense logarithmic expression and evaluate
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Logarithms

09/19/16

Log x + 3 log y condense and evaluate
condense logarithmic expression and evaluate
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Logarithms

09/19/16

Log2(96)-log2(3) condense each logarithmic expression and evaluate
Condense and evaluate 
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