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Tutors Answer Your Questions about Exponential-and-logarithmic-functions (FREE)
Question 71483: I have a worksheet with several problems I need help with. I have the basic rules for logarithms, but they aren't really helping.
1. 5log(base37)37^9=
2. 3log(base24)24^-2/3=
3. (Log(base7)8)/(log(base7)1/8) =
4. 10^(log(base100)9)=
Thank you in advance for your help!!!
Click here to see answer by stanbon(26259)   |
Question 71483: I have a worksheet with several problems I need help with. I have the basic rules for logarithms, but they aren't really helping.
1. 5log(base37)37^9=
2. 3log(base24)24^-2/3=
3. (Log(base7)8)/(log(base7)1/8) =
4. 10^(log(base100)9)=
Thank you in advance for your help!!!
Click here to see answer by josmiceli(3003) |
Question 71654This question is from textbook
: I need some help with two problems. Thanks alot.
Solve the logrithim equation. leave answer in exact form
log x = log 2x^2 -2
solve the equation
ln 4 - ln x = 20
thanks againThis question is from textbook
Click here to see answer by bucky(1732) |
Question 72294: If a piece of real estate purchased for $75,000 in 1998 appreciates at
the rate of 6% per year, then its value t years after the purchase will
be f (t) = 75,000(1 + .06t ) . According to this model, by how much will the
value of this piece of property increase between the years 2005 and
2008?
Click here to see answer by josmiceli(3003) |
Question 72299: The amount of a radioactive tracer remaining after t days is given
by A = A0 e–0.058t, where A0 is the starting amount at the beginning of
the time period. How many days will it take for one half of the
original amount to decay?
Click here to see answer by stanbon(26259) |
Question 73166: I have been trying to figure out the word problem below for a while and can't understand what numbers to plug into the function to solve.
Exponential growth rate for a product is 10% per year. Using the exponential growth function(N=N0e^rt) with r as growth rate, t as number of years since 1995 and N0 as demand in 1995, when will the demand be double that of 1995?
Click here to see answer by ankor@dixie-net.com(6691)  |
Question 74088: please help me with this problem f:R to R is defined by f(x)=2x+1 then f^-1(x)=
y=2x+1
Interchange x and y to get the inverse
x=2y+1
solve for y
y=(1/2)x-1
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Cheers,
Stan H.
this is from a homework assignment thanks
Click here to see answer by stanbon(26259) |
Question 74869: would someone please help me on this problem
I am writing an exponential function
the equation is Y=ab^x and they gave me points (4,8)(8,9)
I can do it up till i get to pluging in the 8 and 9 and then ther ends up bieng 2bs and i dont know wht to do. it problabley dosent sound clear but i have tried it over and over.
Thank you!!!
Click here to see answer by stanbon(26259) |
Question 74866: I have a word problem that i can't figure out would you please help me.
Question- write a exponential function to model the situation. Then estimate the value of the function after 5 years(to the nearest whole number)-- A population of 270 animals that decreses at an anual rate of 22%
I am not totaly sure what formula to use? I think it might be one of the following. A=p(1+r/n)or A=p(1-r/n) Im not sure. Could you please help me to decide what formula to use. Thank you very much!!!
Click here to see answer by stanbon(26259) |
Question 75098: 2^31*4^31*5^62*7^31*8^93=y
When I tried to solve the problem using an online calculator and got strange results. For example, I entered eight to the ninety-third power and got, 9.713344461128645e+83 as an answer which is a format I am unable to work further with. Thanks for your help!
Click here to see answer by Edwin McCravy(2920) |
Question 75554: SMOKING AND COLLEGE EDUCATION
Q1. The tobacco industry closely monitors all surveys that involve smoking. One survey showed that among 785 randomly selected sunjects who completed four years of college, 18.3% smoke(based on data from American Medical Association).
a. Construct the 98% confidence interval for the true percentage of smokers among all people who completed four years of college.
b. Based on the result from part (a),does the smoking rate for those with four year of college appear to be substantially different than the 27% rate for the general population?
Click here to see answer by stanbon(26259) |
Question 76442: I asked this question before and turned it into my teacher but he said it was wrong...so what is wrong with it?
You would take the (whole sale price) + (40% of whole sale price) = retail price
Whole sale price is $75.00 + ($75.00 x 40%) =retail price
$75.00 + .40 (you get .40 because you have to move the decimal 2 places)
now take .40 x 75 = 30
75+30 add them together and you get
$105 retail price = answer
Click here to see answer by checkley75(3666) |
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