Questions on Algebra: Logarithm answered by real tutors!

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Question 381806: The number of milligrams of a certain radioactive substance present at time (t) is given by A(t)= 774e^-(0.018t). How many milligrams are present at t=75? I hope I gave enough information. Please show each step.
Click here to see answer by stanbon(57219)

Question 381801: 2/3^x= 81/16 Please help solve.
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Question 381798: 4^(2x-3)=18 Please help me solve.
Click here to see answer by nerdybill(6948)

Question 382043: 2^3-x=3^x
Click here to see answer by Fombitz(13828)

Question 382006: log5(2x+8)=log5(2x+2)

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Question 382085: log 24 use log 2=a and log 3=b
Click here to see answer by richard1234(5390)

Question 382036: p= (6)log base 9
the equation is 6=__
Click here to see answer by user_dude2008(1861)

Question 382081: a sum of $5000 deposited in an account grows to $7000 in 5 years. assuming annual compounding, what interest rate is being paid?
Click here to see answer by mananth(12270)

Question 382123: write in logarithm form
10^x = 74
256^-0.5 = 1/16
write in exponential form
log6 37=x
Ln y = 53

Click here to see answer by robertb(4012)

Question 382188: Use the properties of logarithms to write the following expression as a single term that doesn't contain a logarithm.
9^(5log[9](x))
Click here to see answer by stanbon(57219)

Question 382190: Solve the following logarithmic. if there is no solution, state No Solution (Round your to 4 decimal places)
ln(x+5)-ln(x-4)=ln(x-2)
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Question 382174: logx(2.5)=2.6 please help me solve.
Click here to see answer by jsmallt9(3296)

Question 382172: log q (x-2) +log q (x-2)=1 please help to solve.
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Question 382171: 3log5 (4x+2) + 5log5 (6x+1) please help solve
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Question 382170: f(x)=log(x) please help to solve and graph.
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Question 382045: let g(x)= log(subscript 2) (x^2+x-12). find the domain of g(X)
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Question 382210: Solve the following logarithmic equation. if there is no solution, state No Solution (Round your to 4 decimal places)
ln(x-2)+ln(x)=0
Click here to see answer by stanbon(57219)

Question 382233: HI,
I have a couple problem im having trouble solving.
I could sure use some help.thanks
log1- log25=
natural log1-natural log8=
Click here to see answer by Alan3354(30959)

Question 382256: simplify:log2 16y5/x7
simplify:log10 x+5/2x+9 (x+5/2x+9 is under a radical
Use 2=a and 3=b:
1)Log 36
2)Log 150
3)Log 1.2
Click here to see answer by Alan3354(30959)

Question 382247: Solve the following exponential equation. Write the answers as a decimal approximation (rounded to 2 decimal places)

9^(2x)=1657

Click here to see answer by solver91311(16868)

Question 382270: Solve the following exponential equation. Write the answers as a decimal approximation (rounded to 2 decimal places)

9^(2x)=1657
Click here to see answer by Alan3354(30959)

Question 382274: express as single logarithm: 1/2loga x -5loga x=
Click here to see answer by CharlesG2(828)

Question 382320: Find log (1/2)+log(2/3)+log(3/4)+log(4/5)+log(5/6+log(6/7)....log(98/98)+log(99/100)
Click here to see answer by stanbon(57219)

Question 382269: 2log3+log2x-log(x+1)
I can't figure out how to write this as a single logarithm.
Thank you!
Click here to see answer by solver91311(16868)

Question 382349: 1) solve the equation 4^x-3*2^x-4=0
2)solve the equation log2(x-4)-log2(x+3)=8
Click here to see answer by Fombitz(13828)

Question 382349: 1) solve the equation 4^x-3*2^x-4=0
2)solve the equation log2(x-4)-log2(x+3)=8
Click here to see answer by jsmallt9(3296)

Question 382407: How do i solve (1/6)=6^(n+4)
Click here to see answer by nerdybill(6948)

Question 382397: Graphs this following function.
g(x)=-log(1/2)(x-1)

Click here to see answer by jsmallt9(3296)

Question 382290: Evalute the following logarithmic expression. Round off your answer to two decimal places
2log[8](11)
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Question 382289: Evalute the following logarithmic expression. Round off your answer to two decimal places
log[5](554)
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Question 382655: Log 150 use 2=a and 3=b
Click here to see answer by Alan3354(30959)

Question 382844: Write in logarithmic form
v^3=5
Click here to see answer by Fombitz(13828)

Question 382902: log(base4)x-2log3=1
How can I solve Logarithms with different bases? How can I change the bases and make it similar.
Click here to see answer by stanbon(57219)

Question 382924: express as a sum of logarithm. ln (yz)
Click here to see answer by nerdybill(6948)

Question 382929: Use a calculator to find the natural logarithm base e.
ln 70
Click here to see answer by stanbon(57219)

Question 382929: Use a calculator to find the natural logarithm base e.
ln 70
Click here to see answer by Alan3354(30959)

Question 382934: find the indicated value of the logarithmic function: ln (e)
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Question 382936: solve for x: log x + (log x + 21)=2
Click here to see answer by Earlsdon(6287)

Question 382936: solve for x: log x + (log x + 21)=2
Click here to see answer by CharlesG2(828)

Question 382926: find an approximate solution to 2^x=3
Click here to see answer by Earlsdon(6287)

Question 382926: find an approximate solution to 2^x=3
Click here to see answer by stanbon(57219)

Question 382958: find an approximate solution 3^x=8
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Question 382958: find an approximate solution 3^x=8
Click here to see answer by Fombitz(13828)

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