# Questions on Algebra: Logarithm answered by real tutors!

Algebra ->  -> Questions on Algebra: Logarithm answered by real tutors!      Log On

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

 Question 93808: can someone find the value of each expression (.68)^5 Click here to see answer by checkley75(3666)

 Question 93809: heres a word problem~~~~ If interest is compounded annually, how much is \$1,000 worth in 8 years at 8%? (but indicate the formula you are using) Click here to see answer by checkley75(3666)

 Question 94183: please write this in an exponential form. log(little a) (then regular) a = 1 Click here to see answer by stanbon(60771)

 Question 94815: I am currently enrolled in a General Chemistry course at a community college. I should apparently already know logarithms, but I don't. Please help! The problem is as follows... The pK_a_ of a solution is defined by the equation: pK_a_ = -logK_a_ Where: K_a_ = acid dissociation constant Use the rules for logarithms and exponents to solve for K_a_ in terms of pK_a_. (a.) K_a_ = _____________ (b.) If pK_a_ = 1.64 then K_a_ = ________________ I have been able to solve problem a. K_a_ = 10^-pK_a_^ However, I cannot figure out how to get the answer to problem b. I know that the correct answer is 2.29E-2 but I can't figure out how they get that answer. Any help would be greatly appreciated! Thank you! Amy M a.mccubbin@insightbb.com Click here to see answer by scott8148(6628)

 Question 95607: pls can you help me check my answer.... log(little8)2 i came up with my answer 1/3 am i right Click here to see answer by bucky(2189)

 Question 95610: dear tutors i have been stumped with this question that did not come from a textbook, please try to answer it for me, thanks. log(2x) + log(x-1) - 2 log(x) = 1. you need to solve for x. i tried converting it into exponential form 10 = 2x(x-1)/x^2, = (2x^2-2x)/x^2 = (2x-2)/x and then multiplication of both sides by x to yield: 10x = 2x-2, then subtraction of 2x from both sides becomes: 8x = -2, division of both sides by 8 yields: x = -1/4 but it is impossible for x to have a negative value since it is impossible to perform a logarithm on a negative? thank you so much for taking the time to figure this out i really appreciate it Click here to see answer by stanbon(60771)

 Question 96003: my problem is: log (base 4) 9x^2 = log (base 2)(5x-8) i think i have to switch the base on the left hand side to 2 which would give me log (base 2) 9x^2 ----------------- = log (base 2)(5x-8) log (base 2) 4 i dont even know if thats right..but after that im completely lost though...any help would be appreciated, thanks. Click here to see answer by scott8148(6628)

 Question 96783: log7 + log (n - 2) = log 6n Click here to see answer by stanbon(60771)

 Question 96788: log2(x - 2) + 5 = 8 - log2 4 Click here to see answer by Nate(3500)

 Question 96798: logy (not a typo) = 1/4log16 + 1/2log49 Click here to see answer by Dognumber7(1)

 Question 96814: log2 (base of 2) of x + 5 (no parentheses) = 8 - log2 (base of 2) of (x+7) Click here to see answer by stanbon(60771)

 Question 96812: log5 (base of 5) of x + 3 (no parentheses) = log5 (base of 5) of (x-20) + 4 Click here to see answer by stanbon(60771)

 Question 98013: What is the smallest value that would be acceptable for "x" in this expression log(base 5) (x+2) Click here to see answer by jim_thompson5910(29613)

 Question 98545: I'm having trouble solving for 'x' in this equation . I have tried re-arranging it to make an exponential equation, but I end up confusing myself even more. Thank you for looking at this. Click here to see answer by stanbon(60771)

 Question 98950: how do you to the log base 2 of the third root of 32. if you could explain too Click here to see answer by Edwin McCravy(9716)

 Question 99196: Solve: log base 2 (3x+6)- log base 2 (x-5)= log base 2 (6) Click here to see answer by Nate(3500)

 Question 99689: what are the characteristics of logarithms of the numbers in : 1. 1.00 2. 2520 3. 2.7 4. 0.0045 5. 2346 6. 0.0009358 7. 89.428 Click here to see answer by stanbon(60771)

 Question 100433: Solve for X 10^(x+3)= 5e^(7-x) I have only gotton to here: 2^(x+3)= e^(7-x) Click here to see answer by Nate(3500)