Questions on Algebra: Exponent and logarithm as functions of power answered by real tutors!

Tutors Answer Your Questions about Exponential-and-logarithmic-functions (FREE)

Question 607736: Please help me solve this math problem: Graph the function.State the domain and range.
y=log3(x+1)
I have a scientific calculator and I forgot how to plug the numbers in when using log I would appreciate it if you can help me with that too thanks!
Click here to see answer by jim_thompson5910(28717)

Question 607813: logx+2-log2x-2=4
the two's are bases. its a log base 2 x+2 minus log base 2 x-2=4
Click here to see answer by ewatrrr(10682)

Question 607998: The attenuation of a 900 MHz mobile phone signal by a concrete wall reinforced with steel mesh is described by,
I(t)=1.2e^(-0.138t)
where t is the thickness of the wall in cm, and I(t) is the intensity
of signal, in mW/m2, measured on the interior of the wall.
(a) What is the signal intensity incident on the exterior of the
wall?
(a) Answer - I think is t=0
900=1.2e^1.2^-0.138*0
900=1.2*1
900/1.2=1.2*1/1.2
750=1
750/1=0
750
(b) If the wall is 25 cm thick, what intensity will be measured
inside? Round your answer to 2 decimal places.
(b) Answer - I think is
750=1.2e^-0.138*0.25
750=1.2e^-0.0345
750/1.2*0.966088=1.2*0.966088/1.2*0.966088
646.9389952
Approx =647

(c) What thickness of wall will drop the intensity to half of the
exterior value? Round your answer to 2 decimal places.
(c) Not sure a bit lost

Click here to see answer by scott8148(6628)

Question 607865: how do you graph the logarithmic equation y= 1/3^(x-1) ?
Click here to see answer by richard1234(5390)

Question 608504: Solve for x by factoring completely: x^4 - 1
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Question 608504: Solve for x by factoring completely: x^4 - 1
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Question 608532: I need help with the following problems:
1. 2log base 8 4- 1 over three log base 8 8
2. Log base 10 (b+3)+log base 10=log base 10 4
3. Log base 5 5^7
4. Log base x 7= 1 half
Click here to see answer by ewatrrr(10682)

Question 608967: given 3^8=6561
write the equivalent Logarithmic equation.
Click here to see answer by Alan3354(31538)

Question 608966: Given f(x)=1800e^-2x , determine f(5).
Click here to see answer by Alan3354(31538)

Question 608968: An investment of $20000 receives interest of 10.5 percent per year compounded continuously.what is the compound amount S if the investment is for a period of 25 years?How much Interest will be earned during this period?
Click here to see answer by ewatrrr(10682)

Question 609079: log(14x+45)-log 7=log 2-log x
Click here to see answer by nerdybill(7011)

Question 609284: Solve 6 to the 6x power=31 round to the nearest thousandth
Click here to see answer by Alan3354(31538)

Question 609304: Find the domain written in set-builder notation:
y=lnx
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Question 609363: At a certain school, the number of children entering kindergarten increased by 6.7% annually for 5 years then decreased by 4.2% annually in the next 5 years. If 110 children enrolled in kindergarten at the beginning of this period, how many were enrolled after 10 years?
Click here to see answer by stanbon(57984)

Question 609663: Solve
Click here to see answer by sophxmai(60)

Question 609688: Use the Change of Base Formula to solve
Round to the nearest ten-thousandth.
Click here to see answer by Alan3354(31538)

Question 609688: Use the Change of Base Formula to solve
Round to the nearest ten-thousandth.
Click here to see answer by jsmallt9(3296)

Question 609971: Please help with this. "write the equation of the parabola in vertex form. V-Vertex, P-Point."
V(-2,4);P(3,-1)
Thank you so much!!
Click here to see answer by ewatrrr(10682)

Question 609969: Please help with this. "write the equation of the parabola in vertex form. V-Vertex, P-Point.
V(0,0); P(1,7)

Thank you for your help.
Click here to see answer by ewatrrr(10682)

Question 610187: factoring quadratics 2Xpower of 2=7X+4

Click here to see answer by scott8148(6628)

Question 610546: Solve
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Question 610818: log base2 (3)+log base 2 (x)= log base 2 (X+7)
Click here to see answer by jsmallt9(3296)

Question 611139: Solve for X, and just for real numbers
log(X+4)+log10(X-5)=1
Click here to see answer by stanbon(57984)

Question 611462: Write and exponential function y=ax^b for a graph that includes (2,-12) and (4,-48)
Click here to see answer by jsmallt9(3296)

Question 611825: Find the range of the function y = -2^x + 2.
Click here to see answer by jsmallt9(3296)

Question 612071: Solve: log(base 2) x - 2log(base2) (x-1) = 1
Click here to see answer by lwsshak3(6764)

Question 612539: Show that log(base p)q = (log(base q) p)^-1
Click here to see answer by solver91311(17077)

Question 612318: Find the maximum power of 91 for which 3*6*9*12....*228*231 is completely divisible?
Click here to see answer by richard1234(5390)

Question 612902: write an exponential equation whose graph passes through the given points
(1,5) (2,7)
Click here to see answer by jim_thompson5910(28717)

Question 612970: cube root (8^2x)=sqrt2^(4x-1)
Click here to see answer by Alan3354(31538)

Question 613763: Hi! how would you solve something like: lnx+ln2=3, i condensed it down to ln2x=3 and i think that's right, but i'm not sure how to solve for x. Thank you so much!!! My test is tomorrow.
(ln is the natural log)
Click here to see answer by scott8148(6628)

Question 613765: Hi! How would you solve log base 2 of x + log base 2 of (x+3) = 2?
Thanks for your help!!!
Click here to see answer by scott8148(6628)

Question 614198: if and then solve

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Question 614198: if and then solve

Click here to see answer by lwsshak3(6764)

Question 614198: if and then solve

Click here to see answer by Alan3354(31538)

Question 614548: Solve for x:
Click here to see answer by stanbon(57984)

Question 614548: Solve for x:
Click here to see answer by sophxmai(60)

Question 614548: Solve for x:
Click here to see answer by lwsshak3(6764)

Question 614561: If = where x and y are greater than 0, show that
Click here to see answer by solver91311(17077)

Question 614561: If = where x and y are greater than 0, show that
Click here to see answer by lwsshak3(6764)

Question 614573: If , show that a^3 = b
Click here to see answer by scott8148(6628)

Question 614564: log4 (x+9)=2
logx 64=2
log2 8=x
2*5^x/4 = 250
Click here to see answer by ewatrrr(10682)

Question 614596: Find the solution of the exponential equation..
3^2x-1=5
7^x/2= 5^1-x
Click here to see answer by Theo(3504)

Question 614647: Suppose a new car bought in 1988 for $14,675 depreciates 15% each year. Predict the car's value in 1995.
Thank you
Click here to see answer by ankor@dixie-net.com(15747)

Question 614549: Solve for x, to 2 decimal places:
Click here to see answer by jsmallt9(3296)

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