99 Answered Questions for the topic Logarithmic functions
10/25/17
Use the definition of the logarithmic function to find x. (Write in exponential form to solve)
log2 x = 5
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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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08/08/17
Write the expression as a single logarithm.
3 log x - 4log y + 1/2 log z
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06/24/17
Worded indicies problem- Find temperature of liquid
When a liquid is placed into a refrigerator, its temperature T°C at a time t minutes is given by the formula
T=T*10^-kt
The temperature is initially 100°C and drops to 40°C in 5 minutes.
Find...
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Logarithmic Functions
04/27/17
Word Problem
The logistical growth function f(t) = 77,000/1 + 1539.0e^-1.3t models the number of people who have become ill with a particular infection t weeks after its initial outbreak in a paticular...
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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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03/09/17
A pie cools in a 70 degree room. The pie is 300 degrees. After ten minuites the pie cools to 260 degrees
Create a formula then find the temp of the pie after 120 minuites
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Logarithmic Functions
02/12/17
A 50g sample of radioactive substance is said to have a half life of 18days, How many grams are remaining after each day? ( totally of days)
what would the exponential regression question be that models the number of grams remaining? y, after x number of days
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Logarithmic Functions
02/11/17
A 50g sample of radioactive substance is said to have a half life of 18days, How many grams are remaining after each day? ( totally of days)
For every half life how many # of days and grams remaining?
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01/29/17
Log problem
On a graph, graph the function f(x)=a^x and g(x)=log sub a x when a=2, a=.5 and a=1. how many points of intersection does each value of a produce ?
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Logarithmic Functions
01/23/17
What are the steps to solve this equation: 2lnx + 3ln4 = 4
logarithmic functions
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Logarithmic Functions
08/05/16
Help with dividing e^-x
How does the equation
ye^-x = -16e^-x +C
go to
y= -16+Ce^-x
how does the c get multiplied by the e^-x rather than divided?
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Logarithmic Functions
07/03/16
Combine the following log into one expression
2ln(x-3)-1/2ln(x+1)-3ln(x2)
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Logarithmic Functions
06/20/16
Math Help Please!!
Scientists at the local university are studying a highly toxic radioactive compound. They have a 200-g sample. They will place this compound in a chamber to be tested. After 3 h, 140 g of the...
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Logarithmic Functions
06/14/16
ln(2 y)+2 ln(y)=x make y the subject of the equation
i)make y the subject of the equation
ii)evaluate y when x = 1.72
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06/03/16
Math Log Problem Please help
use the properties of logarithms to expand the logarithmic expression wherever possible evaluate logarithmic expressions ln((x+4)/(x2-16)5)(4/5)
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Math homework
If point (a,b) lies on the graph y=f(X), the graph y=f-1(X) must contain point ....
A.(b,a)
B.(a,0)
C.(0,b)
D.(-a,-b)
Use the change of base formula to write the following in terms of natural logarithms.
Log8(3)
A. ln(8/3)
B. ln(3/8)
C. ln(3)-3ln(2)
D. 1/3ln(3)/ln(2)
E. 3ln(2)/ln(3)
F. None of the above
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Rewrite the following expression by using the laws of logarithms.
ln(exR6)
A. xe+6ln(R)
B. e+R6
C. x+6ln(R)
D. x+ln(6R)
E. 1+6ln(R)
F. None of the above.
Rewrite the following expression by using the laws of logarithms.
Log9(*squareroot*Q)
A. 2Log9(Q)
B. Log9(Q)
C. 1/2Log2(Q)
D. 1/2+Log9(Q)
E. 1/2Log9(Q)
F. None of the above.
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Rewrite the following expression by using the laws of logarithms.
Log8(x3)
A. Log8(3x)
B. 3Log8(x)
C. 3+Log8(x)
D. Log3(8x)
E. Log(x3)
F. None of the above.
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Rewrite the following expression by using the laws of logarithms.
Log3(13RQ/V)
A. Log3(13)+Log3(R)+Log3(Q)+Log3(V)
B. Log3(13)+Log3(R)-Log3(Q)-Log3(V)
C. Log3(13)+Log3(R)+Log3(Q)
D. Log3(13)-Log3(R)-Log3(Q)+Log3(V)
E. Log3(13)+Log3(R)+Log3(Q)-Log3(V
F....
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Logarithmic Functions
04/19/16
In 2009, the world population reached 7 billon. If we assumed a growth rate of 1.5%, when will the population reach 10 billon?
application that are used to solve this problem.
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