Tutors Answer Your Questions about Exponential-and-logarithmic-functions (FREE)
Question 935599: How to solve logarithmic trendline equations on Excel.
My equation is y = 0.2084ln(x) + 0.0782 and I need to find the value of x. my value for y is 0.088
I would be grateful if you could help me out.
Thanks in advance for the help.
Click here to see answer by ValerieDavis(6)  |
Question 1107574: Public health records indicate that 't' weeks after the outbreak of a certain form of influenza, the number of people who had caught the disease was given by
Q (t) = 19/(4 + 20e^(−1.5t))
Where Q (t) is given in thousands of people.
If the trend continues, approximately how many people will eventually contract the disease? Round your answer to the nearest person.
Click here to see answer by greenestamps(13200)  |
Question 1107750: Determine all the values of x for which:
√x^(log10x)=100
(To be read as "the square root of x to the power of log to the base 10 of x, equals 100")
I tried to solve this, but I keep getting different answers. I think x=100, but how do I find the other possible values of x?
Thank you in advance.
Click here to see answer by Theo(13342)  |
Question 1108963: The count in a bateria culture was 400 after 15 minutes and 2000 after 35 minutes. Assuming the count grows exponentially,
What was the initial size of the culture?
Find the doubling period.
Find the population after 110 minutes.
When will the population reach 10000.
Click here to see answer by josgarithmetic(39620) |
Question 1108963: The count in a bateria culture was 400 after 15 minutes and 2000 after 35 minutes. Assuming the count grows exponentially,
What was the initial size of the culture?
Find the doubling period.
Find the population after 110 minutes.
When will the population reach 10000.
Click here to see answer by greenestamps(13200) |
Question 1111963: If ln a = 2, ln b = 3, and ln c = 5, evaluate the following:
(a) \ln (\frac{a^{-4} }{b^{-4}c^{4}} ) =
(b) \ln \sqrt{ b^{-2}c^{2}a^{3}} =
(c) \frac{\ln (a^{4}b^{-4})}{\ln(bc)^{2}} =
(d) (\ln\ c^{-3})(\ln \frac{a}{b^{-1}})^{3} =
Click here to see answer by Alan3354(69443)  |
Question 1112253: 7. Evaluate the function below over the domain {-1, 0,
1, 2}. As the values of the domain increase, do the
values of the function increase or decrease?
y = (3/4)ˣ
8. Suppose an investment of $5,000 doubles every 12
years. How much is the investment worth after 36
years? After 48 years?
Write and solve an exponential equation.
9. Does the function represent exponential growth or
exponential decay? Identify the growth or decay
factor.
= 9 ∙ (1/2)ˣ
Click here to see answer by stanbon(75887) |
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