Questions on Algebra: Logarithm answered by real tutors!

Tutors Answer Your Questions about logarithm (FREE)

Question 179548: Can i please have a detailed answer step by step of the folllowing question:
i) 9^x+5=50
Click here to see answer by josmiceli(9661)

Question 179548: Can i please have a detailed answer step by step of the folllowing question:
i) 9^x+5=50
Click here to see answer by nerdybill(6951)

Question 179772: Find the value of the expressions in the following by using logarithms. 21)1215 3/2 22)7.864 to the 1.405 power 23)1.05 to the 9 power.Could you also explain to me how you got the answer please.?
Click here to see answer by solver91311(16868)

Question 180846: Can you please help me to calculate ln1700 and also ln9500 (natural logarithm)? is there a formula?
Many thanks!
Cristina
Click here to see answer by stanbon(57246)

Question 181063: please help me with this assignment.
Refer to the graph given below and identify the graph that represents the corresponding function. Justify your answer.
y = 4x
y = log4x

Plot the graphs of the following functions.
1. f(x) = 5x
2. f(x) = 4x+2
3. f(x) = (1/3)x
4. f(x) = log5x

Click here to see answer by Alan3354(30983)

Question 181164: I am totally stuck on this topic. Any help on how to solve would be appreciated.
Click here to see answer by Mathtut(3670)

Question 172231: Please help me solve this equation. Thank you
Click here to see answer by Alan3354(30983)

Question 181467: the level of thorium in a sample decreases by a factor of one-half every 2 million years. A meteorite is discovered to have only 8.6% of its original thorium remaining. How old is the meteorite?
I am having a terrible time trying to figure out this question and I need to show my work. Can you please help me, Heather
Click here to see answer by ankor@dixie-net.com(15638)

Question 181443: For the exponential function e^x and logarithmic function log x, graphically show the effect if x is halved. Discuss the effect of halving the value of x in logarithmic and exponential functions.

Click here to see answer by stanbon(57246)

Question 172230: Please help me solve this equation.
Click here to see answer by Alan3354(30983)

Question 181599: The level of thorium in a sample decreases by a factor of one-half every 2 million years. A meteorite is discovered to have only 8.6% of its original thorium remaining. How old is the meteorite?
Click here to see answer by ankor@dixie-net.com(15638)

Question 181655: Plot the graphs of the following functions.....
1.) f(x)=5^x
2.) f(x)=4^x+2
3.) f(x)=(1/3)^x
4.) f(x)=log5^x
Click here to see answer by Alan3354(30983)

Question 182285: A woman deposits $50,000 in a savings account with 4% continuously compounded interest.How many years must she wait until her balance has doubled?
Click here to see answer by Mathtut(3670)

Question 182304: I need to know how to solve this problem please log7 49
Click here to see answer by stanbon(57246)

Question 182277: Evaluate the functions for the values of x given as 1, 2, 4, 8, and 16. Describe the differences in the rate at which each function changes with increasing values of x.
1. f(x) = 2x – 5
2. f(x) = x2 - 4x + 3
3. f(x) = x3 + 4x2 - 2x - 3
4. f(x) = 7x
5. f(x) = log x

Click here to see answer by mastermath(14)

Question 182378: 1/2 log base 5 1 - 2 log base 5 5
Click here to see answer by stanbon(57246)

Question 182378: 1/2 log base 5 1 - 2 log base 5 5
Click here to see answer by jim_thompson5910(28504)

Question 182378: 1/2 log base 5 1 - 2 log base 5 5
Click here to see answer by nerdybill(6951)

Question 182284: I need help with assignment please....
Give an example of an exponential function. Convert this exponential function to a logarithmic function. Plot the graph of both the functions and post to the discussion forum.
Form each of the following:
A linear equation in one variable
A linear equation in two variables
A quadratic equation
A polynomial of three terms
An exponential function
A logarithmic function

Click here to see answer by ankor@dixie-net.com(15638)

Question 182480: I need help with this assignment please.
for the exponential function e^x and logarithmic function log x, graphically show the effect if x is halved

Click here to see answer by Alan3354(30983)

Question 182437: Calculated the points needed to graph e^x and e^0.5x correctly
Click here to see answer by Alan3354(30983)

Question 182594: Please show what i am doing wrong.
For the exponential function e^x and logarithmic function log x, graphically show the effect if x is halved.

my graph is going in too many directions i do believe. this confuses me all the time

Click here to see answer by Alan3354(30983)

Question 182640: please help i don't know the first step on dealing with these word problems."If an electronic circuit experience a loss of 3decibels with an input power of 6 watts what would its output power be to the nearest watt?" i tried log3,6= but nothing came out.
Click here to see answer by Alan3354(30983)

Question 182501: please solve this question log100=?
Click here to see answer by rapaljer(4667)

Question 182735: Express as a single logarithm
2log5 + log3
Click here to see answer by Alan3354(30983)

Question 182736: express as a single logarithm
2/5log32 - 1/2log4
Click here to see answer by Alan3354(30983)

Question 182853: Please solve this equation:
Click here to see answer by Fombitz(13828)

Question 182886:
Click here to see answer by Mathtut(3670)

Question 183448: Please help me write each expression as a single logarithm. then simplfy if possible:
+
Thank you
Click here to see answer by Alan3354(30983)

Question 183557: Without graphing, determine whether each equation represents exponential growth or decay.
http://i732.photobucket.com/albums/ww330/school_hard/IMG_51371.jpg
Click here to see answer by jim_thompson5910(28504)

Question 183555: please explain how to do this too.. i need these 3 that i cant figue out:)
thanks
Evaluate each logarithm.

http://i732.photobucket.com/albums/ww330/school_hard/IMG_51361.jpg
Click here to see answer by jim_thompson5910(28504)

Question 183897: The altitude of an aircraft, h, in miles, is given by log, where P = the outside air pressure, and B = the atmospheric pressure at sea level. Let B = 31 inches of mercury (in. Hg). What is the outside air pressure at a height of 3.6 miles? Round your answer to the nearest tenth.

Click here to see answer by solver91311(16868)

Question 184298: how to find value log5 from log table
Click here to see answer by rapaljer(4667)

Question 184395: If you invest $3,500 for 3 years and 3 months, how much is it worth to the nearest dollar if it increases 7% a year?

N=No(1+-r)^t
N=3500(1.07)^?
Click here to see answer by checkley77(12569)

Question 184435: x^logx = 100x
Click here to see answer by stanbon(57246)

Question 184436: 27^(x^2+1) = 243
Click here to see answer by stanbon(57246)

Question 184394: Solve for x
log (base of 2)(x^2+8) = log (base of 2)x + log(base of 2) 6
Click here to see answer by edjones(7569)

Question 184633: Solve for N
Log base 4 (Log base 3 (log base 2 N))=1
Click here to see answer by solver91311(16868)

Question 184696: I need some help with part B. Also The answer I got for part A is $46,189.24. Is that correct?
You have $760,000 in your bank account. The interest rate in your account is 5%. Solve for the following:
a. How much interest will you accumulate if interest is compounded annually over the next five years?
b. How much interest will you earn in your account over the next five years with continuous compounding?

Click here to see answer by solver91311(16868)

Question 184747: If p(X)=e^-0.5x find p(3)
Problem is not from textbook it is written homework.
Click here to see answer by jim_thompson5910(28504)

Question 185080: Having trouble with this question:
Solve for x. e is a number, not a variable
2e^(x-2) = e^x + 7
So far, here is my work. I keep going in circles:
e^(x-2) = (e^x + 7)/2
ln(e^(x-2)) = ln((e^x + 7)/2)
x-2 = ln(e^x + 7) - ln(2)
I get lost here.
Click here to see answer by jim_thompson5910(28504)

Question 185120: I am having trouble with a logarithmic bacteria word problem.
A bacterial culture is growing according to the formula y=50,000e^0.8x. In this formula, x is the time in days and y is the number of bacteria. Estimate the number of bacteria after 1 month. (Hint: Assume there are 30 days in a month.)
I am the teacher for my son and do not know how to solve this. The answer is y = 1.324456 x 10^15. Please help.
Click here to see answer by solver91311(16868)

Question 185230: solve the equation. log(x+2)= -log(x-1) +1
Click here to see answer by Alan3354(30983)

Question 185271: Okay, so I don't even know where to start on this problem.
It is very confusing.
I'm not even sure how to write it on the computer, lets see if you can decode my mess. :P

Log^2 5+log^2 x- log 2 10

Please and thankkkk you! (:

Click here to see answer by Alan3354(30983)

Question 185279: Okay.
My question is this...
Log base7 3x-log base7 9x +log base7 6y
I don't know where to start :/
Click here to see answer by vleith(2825)

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