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Tutors Answer Your Questions about logarithm (FREE)
Question 50097: Today is Aug 28th and I'll assign one second of homework. On Aug 29th, I'll assign two seconds of homework. On Aug 30, four seconds; on Aug 31, 8 seconds and so on. I'll continue doubling your homework for 30 school days until Oct 11th. From Oct 11th until the end of the year you will have no homework...sounds good, right? How much homework will you end up with. Show your work.
Thanks,
Nick
Click here to see answer by stanbon(26252)   |
Question 50392: This looks quite not like anything I'm use to seeing and can't come up with the answer. Please help???
The decibel level of sound is given by D=10log(I/10^12), where I is the sound intensity measured in watts per square meter. Find the decibel level of a whisper at an intensity of 5.4 x 10^10 watts per square meter.
Click here to see answer by stanbon(26252) |
Question 50654: Hi, I have a question that is assume log4=.6021 determine log1\16. I know I can do this on the calculator and find log 1/16 is -1.2041, but that gives me no understanding of the problem. Is there a way to do working out to come to the solution??? thanks very much.
Click here to see answer by rapaljer(3610) |
Question 50772: Greetings. I have a word problem that I must use logarithms to figure out.
"On a certain street, a section having an area of 4896.7 square yards is paved at an expense of $12,642,17. What would be the expense to a property holder who pays for 356.28 square yards of the pave?
This is not from a textbook. The questions are similiar to those found in the Penn Foster study units of Technical Math I.
Click here to see answer by stanbon(26252) |
Question 50915: Hi, I have a multiple choice question and i'm stuck between the two answers.
I have ln (x\square root of yz) =
either lnx - 1\2 (ln y - ln z)
or ln x - 1\2 (ln y + ln z).
I have got as far as ln x - square root ln y SOMETHING ln z
I am just not sure whether the SOMETHING should be plus or minus sign.
thanks for your help.
Click here to see answer by rapaljer(3610) |
Question 50927: Hi, I have to solve the following for x
log(little 3) (x+7) - 3loglittle3 2 + log little3 x
I'm not sure how to put teh little 3s on the keyboard, sorry!
If you could please help i would greatly appreciate it. thanks
Click here to see answer by stanbon(26252) |
Question 51777: Hi, I have to solve the following for t:
300=500(1-e^0.2t)
Assume that ln *0.4)= -0.9
I wouldnt even know where to start..all i can think to do is
300\500=(1-e^0.2t)
any help would be very much appreciated! thanks
Click here to see answer by Nate(3495) |
Question 52398: I have a three part problem. But I have the answer to the first part and to the second part. I am having a problem with how to graph the function. The whole question is:
The volume of a cylinder (think about the volume of a can) is given by V = πr2h where r is the radius of the cylinder and h is the height of the cylinder. Suppose the volume of the can is 100 cubic centimeters.
Write h as a function of r. Keep "pi" in the function's equation.
For that part I got 100/Pi(r)^2 = h
The second part says:
What is the measurement of the height if the radius of the cylinder is 2 centimeters? Round your answer to the nearest whole number. I got 8cm.
Then the last part says:
Graph this function
I am unsure how to graph the function to this problem. Thanks for your time.
Click here to see answer by THANApHD(104)  |
Question 52399: I am having a hard time doing this problem.
An open-top box is to be constructed from a 6 by 8 foot rectangular cardboard by cutting out equal squares at each corner and the folding up the flaps. Let x denote the length of each side of the square to be cut out.
Find the function V that represents the volume of the box in terms of x.
Graph this function and show the graph over the valid range of the variable x.
Using the graph, what is the value of x that will produce the maximum volume?
For the function V that represents the volume of the box in terms of x.....I think the answer is: V=x(6-2x)(8-2x). But I'm not sure. And I don't know how to graph it.
Thanks for your time.
Click here to see answer by ChillyWiz(11) |
Question 53224: I have a homework assignment that I am having a hard time solving. I think I have the right answer. But I'm not sure. The question is:
The formula for calculating the amount of money returned for an initial deposit money into a bank account or CD (Certificate of Deposit) is given by
A=P(1+r/n)^nt
A is the amount of returned.
P is the principal amount initially deposited.
r is the annual interest rate (expressed as a decimal).
n is the compound period.
t is the number of years.
Suppose you deposit $10,000 for 2 years at a rate of 10%.
Calculate the return (A) if the bank compounds annually (n = 1). Round your answer to the hundredth's place.
For that problem I did:
A= $10,000(1+.10/2)^2*.10
A=$10,000(1+.05)^2*.10
A=$10,000(1.05)^2*.10
A=$10,000(1.05)^.2
A=$10,000(1.009805798)
A=$10,098.05798
Did I do it right?
Click here to see answer by rapaljer(3610) |
Question 53224: I have a homework assignment that I am having a hard time solving. I think I have the right answer. But I'm not sure. The question is:
The formula for calculating the amount of money returned for an initial deposit money into a bank account or CD (Certificate of Deposit) is given by
A=P(1+r/n)^nt
A is the amount of returned.
P is the principal amount initially deposited.
r is the annual interest rate (expressed as a decimal).
n is the compound period.
t is the number of years.
Suppose you deposit $10,000 for 2 years at a rate of 10%.
Calculate the return (A) if the bank compounds annually (n = 1). Round your answer to the hundredth's place.
For that problem I did:
A= $10,000(1+.10/2)^2*.10
A=$10,000(1+.05)^2*.10
A=$10,000(1.05)^2*.10
A=$10,000(1.05)^.2
A=$10,000(1.009805798)
A=$10,098.05798
Did I do it right?
Click here to see answer by Nate(3495) |
Question 53225: I am not sure if I am doing this problem the right way.
The formula for calculating the amount of money returned for an initial deposit money into a bank account or CD (Certificate of Deposit) is given by
A=P(1+r/n)^nt
A is the amount of returned.
P is the principal amount initially deposited.
r is the annual interest rate (expressed as a decimal).
n is the compound period.
t is the number of years.
Suppose you deposit $10,000 for 2 years at a rate of 10%.
Calculate the return (A) if the bank compounds quarterly (n = 4). Round your answer to the hundredth's place.
Thanks for your time!
Click here to see answer by rapaljer(3610) |
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