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Tutors Answer Your Questions about logarithm (FREE)
Question 151246: The population growth of an animal species is described by F(t)=500+90 log3 (2t+1) where t is measured in months. Find the population of this species in an area 40 month(s) after the species is introduced.
Click here to see answer by oscargut(682)   |
Question 151505This question is from textbook precalculus
: Example 4 on page 352 shows how to do this problem, but I am having problems factoring once I get to the point of setting the 2-x-x^2>0 and then solving for x (factoring is one of my major weaknesses). I seem to have trouble with factoring whenever I am faced with needing to combine the same variable in two different forms (e.g. the -x-x^2). Thanks. This question is from textbook precalculus
Click here to see answer by checkley77(7035)  |
Question 151505This question is from textbook precalculus
: Example 4 on page 352 shows how to do this problem, but I am having problems factoring once I get to the point of setting the 2-x-x^2>0 and then solving for x (factoring is one of my major weaknesses). I seem to have trouble with factoring whenever I am faced with needing to combine the same variable in two different forms (e.g. the -x-x^2). Thanks. This question is from textbook precalculus
Click here to see answer by jim_thompson5910(13786) |
Question 152358: Suppose that the function P= 11+44lnx represents the percentage of inbound e-mail in the U.S. that is considered spam, where x is the number of years after 2002.
Use this model to determine in how many years it will take for the percent of spam to reach 85%?
I am having trouble trying to solve this problem.
I understand that 85=11+44lnx is how to set up the problem, but am not sure how to isolate x to find out the number of years.
Click here to see answer by ankor@dixie-net.com(6691)  |
Question 152408: Hi, my name is Stormy i'm going into 9th grade and I start Wednesday.I have no clue what the logarithm is and i would like too know so that i have a headstart in algebra concept this year. I get all a's and don't want them to drop. This is the first year i did not attend summer school and they learned the logarithm this year. if you could please give me a short explanation of what the logarithm is i would greatly appreciate it.
Thanks again,
Stormy
Click here to see answer by Earlsdon(4898) |
Question 152620: Would someone kindly help me with this algebra question?
A satellite has an elliptical orbit around the earth with one focus at the earth’s center, E. The earth’s radius is 4,000 miles. The highest point that the satellite is from the surface of the earth is 800 miles, and the lowest is 200 miles. What is the eccentricity of the satellite’s orbit?
Thank you in advance for sharing your valuable knowledge :0) !!!
Grateful,
Jai
Click here to see answer by scott8148(3382)  |
Question 152620: Would someone kindly help me with this algebra question?
A satellite has an elliptical orbit around the earth with one focus at the earth’s center, E. The earth’s radius is 4,000 miles. The highest point that the satellite is from the surface of the earth is 800 miles, and the lowest is 200 miles. What is the eccentricity of the satellite’s orbit?
Thank you in advance for sharing your valuable knowledge :0) !!!
Grateful,
Jai
Click here to see answer by Edwin McCravy(2920) |
Question 154054This question is from textbook
: I hope someone can lend a hand on this one. I have tried several different ways to solve but none of the answers check.
Solve for m: Base6^3m-2 + 5 = 9.
Here is what I have so far:
log 6(3m-2) + log 5 = log 9
subtract log 5 from both sides
log 6 (3m-2) = log 9 - log 5
divide both sides by log 6
3m-2 = log 9 - log 5 / log 6
3m-2 = 0.255272505 / log 6
3m-2 = 0.328049984
add 2 to both sides
3m = 2.328049984
divide both sides by 3
m = 0.776016661
Where did I go wrong? Any help is greatly appreciatedThis question is from textbook
Click here to see answer by orca(409) |
Question 154437: Seems like this should be simple...
"Solve for x using logs. Give an exact answer.
4 * 2^x = 6 * 5^x "
I tried:
4*log2^x=6*log5^x
log2^x^4=log5^x^6
log2^4x=log5^6x
log (2^4x)/(5^6x)=0
10^0=(2^4x)/(5^6x)
1=(2^4x)/(5^6x)
so x=0
Which is incorrect. I'd really appreciate some help on this one!
T
Click here to see answer by scott8148(3382) |
Question 154437: Seems like this should be simple...
"Solve for x using logs. Give an exact answer.
4 * 2^x = 6 * 5^x "
I tried:
4*log2^x=6*log5^x
log2^x^4=log5^x^6
log2^4x=log5^6x
log (2^4x)/(5^6x)=0
10^0=(2^4x)/(5^6x)
1=(2^4x)/(5^6x)
so x=0
Which is incorrect. I'd really appreciate some help on this one!
T
Click here to see answer by stanbon(26252) |
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