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

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 Algebra: Exponent and logarithm as functions of power Solvers Lessons Answers archive Quiz In Depth

 Question 546826: Find the exact soulution to each equation: 3log(x)=log(x) What I have so far: log( )= log(x) Click here to see answer by Earlsdon(6287)

 Question 546806: given that the half life of a certain radioactive substance s 20 days and there are 5 grams present initially, the equation that models the situation is s(t)=5(1/2)^t/20. Find the time when here will be 1 gram of the substance remaining Click here to see answer by KMST(1868)

 Question 547517: Find the slope of the line the contains the points (6,-8) and (-2,-4) Click here to see answer by mananth(12270)

 Question 547568: What is 16, base 2? What does base 10 mean..like 1,000,000 base 10 Click here to see answer by unlockmath(1599)

 Question 547874: given x=-1,0,1,2,3 and F(x)=3,6,12,18,30 determine if this is an exponential function and identitfy the value of base a..Hint look at the ratio of consecutive values I can get base a on my calculator but I am not sure how to perform the ratio of consecutive values Click here to see answer by stanbon(57246)

 Question 548116: Magnitude of a star is modeled by M=6-5/2logI/Isubscript o. Determine the ratio of light intensities between a star of magnitude 1 and a star of magnitude 3. I need help to even try to get started on this problem. I do not understand it at all and there is really ni help in the book. Click here to see answer by stanbon(57246)

 Question 253874: beryllium-11 decomposes into boron-11 with a half life of 13.8 seconds. How long will it take 240 g of beryllium-11 to decompose into 7.5g of beryllium-11? based on the forumula provided in the text book C(t)=C(0)2e^-t/h where C(0) = 240, C(t)=7.5 ,h=13.8 7.5/240=2e^-t/13.8 this was a s far as i got Click here to see answer by martin.jabou(1)

 Question 548456: Magnitude of a Star The magnitude M of a star is modeled by: M=6-5over2 log I over I subscript 0 Where I subscript 0 is the intensity of a just visible star and I is the actual itensity of the star being measured. The dimmest stars are of a magnitude 6, and the brightest are of a magnitude 1. Determine the ratio of light intensities between a star of magnitude 1 and a star of magnitude 6. NOTE: 5 over 2 is a fraction and I over I subscript 0 is a fraction. The log is inbetween both fractions. I really need help with this problem as I cannot even know where to begin on it. I would greatly appreciate the help. Click here to see answer by KMST(1868)

 Question 548837: I have a problem like 7 ^ log base 7 x. The question asks me to Simplify the expression using inverse properties. How would I go about doing so? Click here to see answer by lwsshak3(6469)

 Question 549396: how do you solve this equation: five to the power of 2x divided by five to the power of 2x + 1 Click here to see answer by Alan3354(30983)

 Question 549407: inverses of functions: Evaluate if F(x)=3x+7 what is f(6)? Click here to see answer by stanbon(57246)

 Question 549463: What is the remainder if 2^2011 is divided by 5? Click here to see answer by Alan3354(30983)

 Question 549847: You invest \$800 in an account with an annual interest rate of 3.2%, compounded annually. How much in in the account after 15 years? Round your answer to the nearest whole number Click here to see answer by jim_thompson5910(28504)
 Question 549847: You invest \$800 in an account with an annual interest rate of 3.2%, compounded annually. How much in in the account after 15 years? Round your answer to the nearest whole number Click here to see answer by stanbon(57246)

 Question 549870: How do I make the equation y=ab^x with two points, (5,4) and (7,9)? Click here to see answer by stanbon(57246)
 Question 549870: How do I make the equation y=ab^x with two points, (5,4) and (7,9)? Click here to see answer by Alan3354(30983)

 Question 550096: complete the trinomial such that it's a perfect square: y=x2+_x+81 Click here to see answer by stanbon(57246)

 Question 550116: When several boys tried to divide a sum of money by giving 10 dollar to each boy,7 boy got nothing.when each boy took 9 dollar,the had 7 dollar left over.what is the sum of the number of money and the number of boys? Click here to see answer by ankor@dixie-net.com(15638)

 Question 550115: Find the constant term of the expansion of (x^-2+x^3)^15 Click here to see answer by stanbon(57246)

 Question 550298: if f(x)=x^2 and g(x)=x-3 find (f o g) (0). Click here to see answer by oberobic(2304)

 Question 550300: four consecutive #'s subtract to be -50. What is the third number? Click here to see answer by Alan3354(30983)

 Question 550304: put this conic section in standard form. What is the a^2 value? 25x^2+16y^2+150x=160y-225 Click here to see answer by lwsshak3(6469)