Tutors Answer Your Questions about Exponential-and-logarithmic-functions (FREE)
Question 179442: Hello dear tutor,
I need help with a certain math problem today that we just learned in class, but I can only get how to do really with like an actual example from my homework, which is why I am here, trying to learn! So here is the question! Thanks so much for helping out! it means ALOT!
Which grows faster as x increases, x^3, or 3^x? Explain.
Click here to see answer by josmiceli(19441)   |
Question 179440: Hello dear tutor,
I need help with a certain math problem today that we just learned in class, but I can only get how to do really with like an actual example from my homework, which is why I am here, trying to learn! So here is the question! Thanks so much for helping out! it means ALOT!
Radon-222 is a gas that escapes from rocks and soil. It can accumulate in buildings and can be dangerous for people who breathe it. Radon-222 decays to polonium and eventually to lead.
a. Find the percent decrease in the amount of radon-222 each day.
b. Write an exponential decay function for th amount of a 500 mg sample of radon-222 remaining after t days.
c. How much of the radon-222 sample would remain after 14 days?
Click here to see answer by stanbon(75887) |
Question 179439: Hello dear tutor,
I need help with a certain math problem today that we just learned in class, but I can only get how to do really with like an actual example from my homework, which is why I am here, trying to learn! So here is the question! Thanks so much for helping out! it means ALOT!
On federal income tax returns, self-employed people can depreciate the value of business equipment. Suppose a compter valued at $2765 depreciates at a rate of 30% per year. Estimate the number of years it will take for the computer's value to be less than $350.
Click here to see answer by stanbon(75887) |
Question 179674: -Tessa has an antique plate valued at $75. It is expected to increase in value 8% per year.
a.) how would you write a function for the value of the plate in t years?
b.) how would you find out how much it would be worth in 10 years?
c.) how would you find out when the plate would reach a value of $200?
Click here to see answer by ankor@dixie-net.com(22740)  |
Question 180673: Suppose that the number of new homes built, H, in a city over a period of time, t, is graphed oon a retangular coordinate system where time in on the horizontal axis. Suppose that the number of homes built can be modeled by a exponential function, H=p*at, where p is the number of homes built in th efirst year recorded. If you were a homebuilder looking for work would you prefer that the value if "a" to be between 0 and 1 or larger that 1? Explain your reasoning
Click here to see answer by stanbon(75887) |
Question 181705: A cell divides into two identical copies every 4 minutes. How many cells will exist after 5 hours?
This is where I am at so far:
60 minutes = 1 hour
300 minutes = 5 hours
a cell divides into 2 every 4 minutes
300/4 = 75
75^2 = 5625
I feel that there is something that I missed please look it over and let me know. Thank you
Click here to see answer by Mathtut(3670) |
Question 181705: A cell divides into two identical copies every 4 minutes. How many cells will exist after 5 hours?
This is where I am at so far:
60 minutes = 1 hour
300 minutes = 5 hours
a cell divides into 2 every 4 minutes
300/4 = 75
75^2 = 5625
I feel that there is something that I missed please look it over and let me know. Thank you
Click here to see answer by stanbon(75887) |
Question 181705: A cell divides into two identical copies every 4 minutes. How many cells will exist after 5 hours?
This is where I am at so far:
60 minutes = 1 hour
300 minutes = 5 hours
a cell divides into 2 every 4 minutes
300/4 = 75
75^2 = 5625
I feel that there is something that I missed please look it over and let me know. Thank you
Click here to see answer by solver91311(24713)  |
Question 182244: Radioactive iodine is used to determine the health of the thyroid gland it decays according to the equation y=ae*-0.0856t where t is in days find the half life of this substance
i dont understand all you are given is the exponent of -0.0856
Click here to see answer by Fombitz(32388)  |
Question 182425: Show a graph for all given equations and solve.
• A linear equation in one variable
3x - 4 = 5
• A linear equation in two variables
2x – y= 5
• A quadratic equation
x² + 2x - 8
• A polynomial of four terms
6xy – 4xy + 3x + 24 = 0
• An exponential function
f(x)= 2x
• A logarithmic function
Y= log₃ 5
Click here to see answer by Alan3354(69443)  |
Question 182589: the amount g(in trillions of cubic feet) of natural gas consumed in the US from 1940-1970 can be modeled by g=2.91(1.07) to the t where t is the number of years since 1940.
44) graph the function
45) estimate the natural gas consumption in 1955
Click here to see answer by solver91311(24713) |
Question 180439: do exponential functions only model phenomena that grow, or can they also model phenomena that decay? Explain what is different in the form of the function in each case.
I feel that they can grow or show decay if you have a exponential that is positive or negative
Click here to see answer by Alan3354(69443) |
Question 182605: Population studies of fiddler crabs on a tropical island reported 1.1 x 10^4 in 1980 and 1.5 x 10^4 in 1982. Predict the time that the maximum population, 2.0 x 10^4, that can be supported by the island's resources will be reached.
Click here to see answer by stanbon(75887) |
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