College Algebra

posted by .

I am having a difficult time with this question. Any help whatsoever will be really helpful as I have been pulling an all nighter for my test at 4pm.
The question reads as follows:

Suppose that y=[2-log(100-x)]/0.29 can be used to calculate the number of years y for x percent of a population of 928 web-footed sparrows to die. Approximate the percentage (to the nearest whole percent) of web-footed sparrows that died after 5 years.

The answer is supposed to be 96% but I am just not getting it. I have a feeling its not hard but I'm missing something crucial.

Thanks for all the help!

  • College Algebra -

    .29*5=2-log(100-x)
    log(100-x)=.55
    100-x=3.55
    x=96.4

  • College Algebra -

    =/
    I still do not understand. This is my setup.

    5=[2-log(100-x)]/.29
    1.45 = 2-log(100-x)
    -.55 = -log(100-x)
    .55= log(100-x)
    Now I am frozen there... If i take the log of both sides I do have 100-x on the right but obtain -.2596 for the left. The problem would equal 100.2596 and not 96.4.

    In your setup, I am confused as to where the 100-x=3.55 came from.

    Thank you so much, you don't understand how helpful you guys are for taking the time to help us.

  • College Algebra -

    1.45=2-log(100-x)
    -.55=-log(100-x)
    .55=log(100-x)
    take the antilog of each side
    3.458133892=100-x

    You are taking the LOG of both sides. You want the antilog.

  • College Algebra -

    Thank you so much!!! I got it!

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. math

    Suppose that a college admissions office needs to compare scores of students who take the Scholastic Aptitude test(SAT) wit those who take the american college test (ACT). Suppose that among the college's applicants who take the SAT, …
  2. chemistry

    I am having a ton of trouble with this lab question, I do not understand it at all. The question is: Show how the rate of reaction in reciprocal seconds was calculated for the mixture in question 1, using the class average. The mixture …
  3. CHEMISTRY

    I am having a ton of trouble with this lab question, I do not understand it at all. The question is: Show how the rate of reaction in reciprocal seconds was calculated for the mixture in question 1, using the class average. The mixture …
  4. Human Service

    I am still trying to understand this question. I need to generate a list of helpful and unhelpful respones that I have personally experienced?
  5. advanced functions

    I need help figuring this question out please :) log2=log(x+5)-1 I have been studying for my test and this is a question i got stuck on.
  6. statistics

    (Blood Test Problem) Suppose 100 people are waiting for blood test for a kind of disease. The probability that for one person the test result is positive equals 0.1. Two test methods are as follows: Method 1: Test one by one. Then …
  7. college algebra

    Write expression as one logarithm and simplify if appropriate. log 3√x + log x^4 - log x^3 4 log (x+3) - 5 log (x^2+4) + 1/3 log y I have these who problems but I don't know where to start. HELP Please.
  8. Math

    Hey! So, I've been working on this problem for awhile but I'm currently a bit dumbfounded on how to solve it. I think this question has been answered before but I still don't quite understand how it works or how to explain it. The …
  9. Gifted and Talented Language Arts

    I need to know what concrete poems are. Whenever I look up "what are concrete poems" all that comes up are concrete-making businesses. I really need help because every question I get right counts and I am so close to having an average …
  10. algebra

    Hi I'm having trouble with this question I don't understand it at all. This is the question: Suppose y varies directly with x, and y = 15 and x = 5. Write a direct variation equation that relates x and y. What is the value of y when …

More Similar Questions