441 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...
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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!

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...
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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?

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...
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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)

#### 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?

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

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 :)

Logarithms

10/13/16

#### n=250e^kt n=375 t=7, if n=750 what is t?

Solve for T, using natural log please!!

Logarithms

09/27/16

#### 0.475= 2-[log(%)] How do i get the percentage?

Absorption (A) = 0.475
%= dilution
Equation is A= 2-[log(%)]

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

#### Why is ln(e+5) = lne + ln5 false?

You can't distribute the natural log? I don't understand.

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

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

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

Logarithms

09/19/16

#### 3 ln x + 5 lny - 6 ln z condense and evaluate

condense logarithmic expression and evaluate

Logarithms

09/19/16

#### 4 ln(x + 6) - 3 ln x condense and evaluate

condense logarithmic expression and evaluate

Logarithms

09/19/16

#### 1/2 In x + In y condense and evaluate

condense logarithmic expression and evaluate

Logarithms

09/19/16

#### Log x + 3 log y condense and evaluate

condense logarithmic expression and evaluate

Logarithms

09/19/16

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

Condense and evaluate

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