106 Answered Questions for the topic Logarithmic Equation

09/29/18

#### Using formula Nt = N0 x 2^n Calculate amount of time it takes for 1 cell that divide every 5 hours to make 8.8 x 10^14 cells

When I try to calculate the log2 8.8 x 10^14 = n, I get approximately 50 divisions as my answer. Shouldn't I be able to get 8.8 x 10^14 if I now substitute 50 as n in 2^n power? I get a slightly...
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08/22/18

#### Solving logarithmic equation

52x-(51+50).5x+51=0And my answer just simply rewrite into (5x)2-6.5x+5=0And then write into (5x-1)(5x-5),why?What's the process between (5x)2-6.5x+5=0 to this equation?

04/29/18

#### Logarithim Question

Solve the Equations
1.log x=6
I got 100,000 but I am just checking to see if I am correct
2. log(lower)5 (regular)5^3
I got 3

04/10/18

#### How long would it take in years, for $5500 to grow to $9000 at 7.5% annual interest compounded monthly

How long in years

04/01/18

#### When evaluating exponential equations using logarithms, why do we need to isolate the variable first?

For example,
3e^(2x)=1821
The correct solution would be,
1. Divide 3 on each side, thus e^(2x)=607
2. Take the natural log on both sides: lne^(2x)=ln607
3. Eliminate...
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03/13/18

#### The population P (in thousands) of Pittsburgh, PA from 2000 to 2003 can be modeled by P=2430e^ -0.0029t where t represents the yr, with t=0 corresponds to 2000.

Question: What were the populations of PA in 2000 and 2003?
Answer: 2000: 2,430,000, 2003: 2,408,950
Can someone please explain/list to me the steps to finding these answers?

02/11/18

#### Solving exponential and logarithmic equations

A certain form of bacteria doubles every two hours. If a sample begins with 3 bacteria,(a) write a function to describe the population at time t and,(b) find the population a t = 2 hours

01/30/18

#### Logarithmic equation in chemistry

Hi! If i have boric solution (Mvb) and it contains (p%) of boric acid. How much i have to add boric acid (Xb) so that the solution have (P%) of boric acid? Only using these letters to make an...
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01/29/18

#### Math problem in chemistry

Electomagnetic radiation equation in task A)
I(x) is radiation emitted through the material layer intensity (W/m2)
u is absorption coefficient (1/mm)
x is thickness
A)From the I(x)=I0e-ux...
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12/01/17

#### A=p(1+r/n)^tn and A=Pe^rt

Which is a better plan for investing $10,000 for 8 years?
Plan A: 4.5% Compounded continuously or
Plan B: 5.5% Compounded daily?
Rewrite in logarithmic form:2^4=16
Solve the log...
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11/10/17

#### Rewrite equation in logarithmic form. - Show Work.

Equation: 192 = 361
Choices:
A) log361 19 = 2
B) log361 2 = 19
C) log19 361 = 2
D) log19 2 = 361

11/02/17

#### logarithmic equation log2(x+4)+log2(x+7)=2

solve the logarithmic equation log2(x+4)+log2(x+7)=2
Please Explain

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

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