Questions on Algebra: Logarithm answered by real tutors!

Algebra ->  Algebra  -> Logarithm Solvers, Trainers and Word Problems -> Questions on Algebra: Logarithm answered by real tutors!      Log On

Ad: Algebra Solved!™: algebra software solves algebra homework problems with step-by-step help!
Ad: Algebrator™ solves your algebra problems and provides step-by-step explanations!

   


Tutors Answer Your Questions about logarithm (FREE)


Question 236622: This is a logarithmic equation not really understanding this.
A woman deposits 50,000 in a savings account with 4% continuously compounded interest. How many years must she wait until the balance has doubled.

Click here to see answer by stanbon(57347) About Me 
Question 236622: This is a logarithmic equation not really understanding this.
A woman deposits 50,000 in a savings account with 4% continuously compounded interest. How many years must she wait until the balance has doubled.

Click here to see answer by Edwin McCravy(8909) About Me 

Question 236760: Solve equation and provide solution to 4 decimal places.
12%281.5%29%5E%28x%2B1%29=13
Thanks for helping!!

Click here to see answer by scott8148(6628) About Me 

Question 236758: Solve the equation and provide solution to 4 decimal places.
%28sqrt3%29%5E%28x%2B1%29=9%5E%282x-1%29
Thanks for your help!

Click here to see answer by scott8148(6628) About Me 

Question 236766: What is x if: log_x(16) = -2
Click here to see answer by scott8148(6628) About Me 

Question 236777:
What is "log base 5 times the quantity (x-1) minus log base 5 times quantity (x-2) equals 2" ? I don't get it. PLEASE HELP.

Click here to see answer by nerdybill(6959) About Me 

Question 236872: Convert to a logarithmic equation.
e-2 = t

Click here to see answer by jim_thompson5910(28595) About Me 

Question 236887: Find (2x) given that sin(x)=2/5 and x is in quadrant II. Give exact value for sin(2x)
Click here to see answer by Alan3354(30993) About Me 
Question 236887: Find (2x) given that sin(x)=2/5 and x is in quadrant II. Give exact value for sin(2x)
Click here to see answer by nyc_function(2733) About Me 

Question 236978: 2= 5e^-0.35h


Your are trying to find H

Click here to see answer by Theo(3464) About Me 

Question 237006: Solve for x: If log8 (x – 6) + log8 (x + 6) = 2, then x =
Click here to see answer by solver91311(16885) About Me 
Question 237006: Solve for x: If log8 (x – 6) + log8 (x + 6) = 2, then x =
Click here to see answer by jsmallt9(3296) About Me 

Question 237220: Let's imagine that in 2001, a surgeon performs the first brain transplant, the only transplant performed that year. If in 2010, there are 983 brain transplants, find an exponential growth function that fits the data. (Round decimals to three places.)
Click here to see answer by nerdybill(6959) About Me 

Question 237215: This is a story problem I am stuck on could use some help.
A computer is infected with the sasser virus. Assume that it infects 20 other computers in 5 minutes; and that these PCs and servers infect 20 more machines within another five minutes, etc. How long until 100 million computers are infected?

Click here to see answer by Theo(3464) About Me 

Question 237321: Expand: Log2{x^4y^3/5n^2}
Click here to see answer by rapaljer(4667) About Me 

Question 237394: ln+%28x-3%29=-%28x%5E2%29%2B14 is my problem. I know x is approx 3.77, but I need to understand how to get this. If I understand correctly, this is the same as log%28e%2C%28x-3%29%29=-%28x%5E2%29%2B14. I think this can also be e%5E%28-%28x%5E2%29%2B14%29=x-3, but I'm not sure where to go from there. Can you help? I'd really appreciate it!
Click here to see answer by Edwin McCravy(8909) About Me 

Question 237532: log(2x)-log(x-3)=1
Click here to see answer by edjones(7569) About Me 

Question 237751: Log x = 2.5
Click here to see answer by stanbon(57347) About Me 
Question 237751: Log x = 2.5
Click here to see answer by Alan3354(30993) About Me 

Question 237761: hi i am trying to figure out where to go with this problem ln6+ln(x-2)=ln(3x-2). it seems like i can get it to ln6=2x but from there it turns out to be x=.8958 but the answer is supposed to come out to be x=10/3 where am i going wrong?
Click here to see answer by vleith(2825) About Me 
Question 237761: hi i am trying to figure out where to go with this problem ln6+ln(x-2)=ln(3x-2). it seems like i can get it to ln6=2x but from there it turns out to be x=.8958 but the answer is supposed to come out to be x=10/3 where am i going wrong?
Click here to see answer by scott8148(6628) About Me 

Question 237827: hi i am having a little trouble with this one Lnx+Ln(x+12)=1. I kind of remember that due to the fact that it is an addition problem you use multiplication but i dont remember how!
Paul

Click here to see answer by solver91311(16885) About Me 
Question 237827: hi i am having a little trouble with this one Lnx+Ln(x+12)=1. I kind of remember that due to the fact that it is an addition problem you use multiplication but i dont remember how!
Paul

Click here to see answer by stanbon(57347) About Me 

Question 237849: hi i am having a little trouble with this one Lnx+Ln(x+2)=1. I kind of remember that due to the fact that it is an addition problem you use multiplication but i dont remember how!
Paul

Click here to see answer by jim_thompson5910(28595) About Me 

Question 238000: ln8x=5
Click here to see answer by nerdybill(6959) About Me 

Question 237989: rounded to the nearest tenth, algebraically find the solution(s) of logx+log2x=1
Click here to see answer by nerdybill(6959) About Me 

Question 238004: log2x=log3 + log(x-4)
Click here to see answer by nerdybill(6959) About Me 

Question 238003: 4.6^x-76=0
Click here to see answer by jsmallt9(3296) About Me 

Question 238002: 4.6^x-76=0
Click here to see answer by edjones(7569) About Me 

Question 238160: solve the equation: in e^x-In e^4=In e^5
Click here to see answer by Alan3354(30993) About Me 

Question 238218: i really need this answer
and the steps to it
log(base 3)(x^2-3) is greater than 0

Click here to see answer by jsmallt9(3296) About Me 

Question 238165: log5(log5 x)=1
Click here to see answer by jsmallt9(3296) About Me 

Question 238185: .}log(x-5y)=2
logx-logy=1

Click here to see answer by jsmallt9(3296) About Me 

Question 238168: log5(x+2)+log5(x-2)=3
Click here to see answer by jsmallt9(3296) About Me 

Question 238104: Solve equation:
Inx + 2In4 = In7 - Inx

Click here to see answer by jsmallt9(3296) About Me 

Question 238434: I tried everything and seem to never get the answer.
Log(base 2)1/4 - log(base 3)1/81 = log(base 7)x

Click here to see answer by edjones(7569) About Me 

Question 238433: Log (base of square root 3) (square root of 9 with a 3 on the root in front) ^5x
Click here to see answer by jsmallt9(3296) About Me 

Question 238503: what is the logarithmic form of 7^5=16,807?
Click here to see answer by nyc_function(2733) About Me 

Question 238700: What is the solution set of LOG8X+LOG8(x-12=2
Click here to see answer by nerdybill(6959) About Me 

Question 238739:
1. 5.logbx+9.logby-3.logbz
2. log2x+log2(x-6)=4
3. logbx-(logby+logbz)

Click here to see answer by JimboP1977(308) About Me 

Question 238822: I need to prove why the following equations are equal to each other. I have tried factoring, and using the rules for logarithms (meaning using multiplication when adding and division when subtracting). I still can not figure it out. I do not know how to use subscripts for math problems on a computer so if you don't understand what I am asking it is completely understandable. But for now I will use log(2) of 3, meaning a log with a base of two, of three. Here is the equation:
[6log(2)3] / [1 + log(2)3] = [6ln3] / [ln2 + ln3]
Thank you,
Heather

Click here to see answer by stanbon(57347) About Me 
Question 238822: I need to prove why the following equations are equal to each other. I have tried factoring, and using the rules for logarithms (meaning using multiplication when adding and division when subtracting). I still can not figure it out. I do not know how to use subscripts for math problems on a computer so if you don't understand what I am asking it is completely understandable. But for now I will use log(2) of 3, meaning a log with a base of two, of three. Here is the equation:
[6log(2)3] / [1 + log(2)3] = [6ln3] / [ln2 + ln3]
Thank you,
Heather

Click here to see answer by kensson(21) About Me 

Question 239105: solve without using a calculator:
5^(3-x)= 1/125

Click here to see answer by Theo(3464) About Me 
Question 239105: solve without using a calculator:
5^(3-x)= 1/125

Click here to see answer by jsmallt9(3296) About Me 

Question 239148: PLEASE HELP
solve for x:
9/2 log(base4)x=5

Click here to see answer by JimboP1977(308) About Me 

Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 3871..3915, 3916..3960, 3961..4005, 4006..4050, 4051..4095, 4096..4140, 4141..4185, 4186..4230, 4231..4275, 4276..4320, 4321..4365, 4366..4410, 4411..4455, 4456..4500, 4501..4545, 4546..4590, 4591..4635, 4636..4680, 4681..4725, 4726..4770, 4771..4815, 4816..4860, 4861..4905, 4906..4950, 4951..4995, 4996..5040, 5041..5085, 5086..5130, 5131..5175, 5176..5220, 5221..5265, 5266..5310, 5311..5355, 5356..5400, 5401..5445, 5446..5490, 5491..5535, 5536..5580, 5581..5625, 5626..5670, 5671..5715, 5716..5760, 5761..5805, 5806..5850, 5851..5895, 5896..5940, 5941..5985, 5986..6030, 6031..6075, 6076..6120, 6121..6165, 6166..6210, 6211..6255, 6256..6300, 6301..6345, 6346..6390, 6391..6435, 6436..6480, 6481..6525, 6526..6570, 6571..6615, 6616..6660, 6661..6705, 6706..6750, 6751..6795, 6796..6840, 6841..6885, 6886..6930, 6931..6975, 6976..7020, 7021..7065, 7066..7110, 7111..7155, 7156..7200, 7201..7245, 7246..7290, 7291..7335, 7336..7380, 7381..7425, 7426..7470, 7471..7515, 7516..7560, 7561..7605, 7606..7650, 7651..7695, 7696..7740, 7741..7785, 7786..7830, 7831..7875, 7876..7920, 7921..7965, 7966..8010, 8011..8055, 8056..8100, 8101..8145, 8146..8190, 8191..8235, 8236..8280, 8281..8325, 8326..8370, 8371..8415, 8416..8460, 8461..8505, 8506..8550, 8551..8595, 8596..8640, 8641..8685, 8686..8730, 8731..8775, 8776..8820, 8821..8865, 8866..8910, 8911..8955, 8956..9000, 9001..9045, 9046..9090, 9091..9135, 9136..9180, 9181..9225, 9226..9270, 9271..9315, 9316..9360, 9361..9405, 9406..9450, 9451..9495, 9496..9540, 9541..9585, 9586..9630, 9631..9675, 9676..9720, 9721..9765, 9766..9810, 9811..9855, 9856..9900, 9901..9945, 9946..9990, 9991..10035, 10036..10080, 10081..10125, 10126..10170, 10171..10215, 10216..10260, 10261..10305, 10306..10350, 10351..10395, 10396..10440, 10441..10485, 10486..10530, 10531..10575, 10576..10620, 10621..10665, 10666..10710, 10711..10755, 10756..10800, 10801..10845, 10846..10890