Tutors Answer Your Questions about Exponential-and-logarithmic-functions (FREE)
Question 169646: Will you please help me with the following problem? I need to express Log base three of twenty seven to the negative third power as a product and then simplify it. I have tried writing it as an exponential equation instead but it didn't go so well. I got stuck once I changed it into Three to the x power is equal to twenty seven to the negative third power. Am I even on the right track? Please help!
Click here to see answer by Alan3354(69443)   |
Question 169643: I really need your help evaluating this- log base four of one sixteenth. I am supposed to use mental math and I have no Idea how to do this. Would you please help me? (Sorry about spelling it out, I don't know how to type numbers with exponents or bases.)
Click here to see answer by Alan3354(69443) |
Question 169650: The graph of an exponential function is given. Select the function for the graph from the functions listed.
There is a graph attached to the problem, but I was unable to load it. Start on the x axis at -1,0 bending up to the y axis (1,1). If you would like me to email you the graph, I can.
The following are answers that are avaiable;
f(x) = 4x + 2
f(x) = 4x - 2
f(x) = 4x + 2
f(x) = 4x
Click here to see answer by jim_thompson5910(35256) |
Question 170051: Please help me with:
The speed of the current in a river is 2mph. Jay travels 20 miles upstream and then 20 miles downstream in a total time of 5 1/3 hours. Find the speed of the boat.
Let s be the speed of the boat.
Click here to see answer by stanbon(75887) |
Question 170129: I do not understand how to solve this problem.
N(2)= 7000/1+999e^-2
How do you get the answer? I've got the answer. It is 7000/1+(135.199947953)
I don't know what to do to get it . I'm stuck. Thank you for helping me.
Click here to see answer by Alan3354(69443) |
Question 170206: Can someone please explain how to answer the following 2 problems? Any assistance is greatly appreciated!
The population of a country doubled in 100 years. What was the exponential growth rate?
and
Solve
ln square root of x-2=1
Click here to see answer by Alan3354(69443) |
Question 170256: Can someone please explain how to solve the following 2 problems. Any assistance you can provide is greatly appreciated!
the log of (x+5), base 2 + the log of (x-1), base 2 =4
and
the log of 6, base 36 = x
Click here to see answer by Earlsdon(6294) |
Question 171323: The cost of attending college has been rising at an average increase of 7% for the past ten years. How much will college that now costs $10,368 for room, board, tuition and fees cost two yearsfrom now?
Click here to see answer by Mathtut(3670) |
Question 171742: This is the last part of my homework and I am completely stumped on how to do exponents and logarithms. Please help me. It is 12:25am EST and I can not get this. Help me please!
1. A cell divides into two identical copies every 4 minutes. How many cells will exist after 3 hours?
2. The level of thorium in a sample decreases by a factor of one-half every 4.2 million years. A meteorite is discovered to have only 7.6% of its original thorium remaining. How old is the meteorite?
Click here to see answer by Alan3354(69443) |
Question 171741: I am having trouble solving these three questions involving logarithms and exponents. Any help with solving these would be appreciated. Thank you!!!!!
1. 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
2. True or false: The function "f(x) = 3x" grows three times faster than the function "g(x) = x". Explain.
3. What are the asymptotes of the functions "f(x) = 3x" and "g(x) = log52x"?
Click here to see answer by stanbon(75887) |
Question 172076: Dear tutors, I am desperate, I need help plotting and graphing these questions. Any assistance will be greatfully appreciated! Thank you!
Plot the graphs of the following functions and graph.
1. f(x)=7x
2. f(x)=4x - 3
3. f(x)=(1/5)x
4. f(x)= log3x
Click here to see answer by Alan3354(69443) |
Question 172076: Dear tutors, I am desperate, I need help plotting and graphing these questions. Any assistance will be greatfully appreciated! Thank you!
Plot the graphs of the following functions and graph.
1. f(x)=7x
2. f(x)=4x - 3
3. f(x)=(1/5)x
4. f(x)= log3x
Click here to see answer by solver91311(24713)  |
Question 172169: completing squares
directions: find the value of c that makes the expression a perfect square trinomial. Then write the expression as the square of a binomial.
question: x2 + 10x + c
my work: 10
-- = 5 then (5)2= 25 then x2 + 10x + 25 = 0 then (x + 5) 2 = 0
2
then I square rooted both sides which = x + 5 = 0 x = + 5
-5 -5 -
-----------
Well I don't know if I did it right someone please help.
Click here to see answer by stanbon(75887) |
Question 173000: How do I evaluate the functions for the values of x given as 1, 2, 4, 8, and 16 and then describe the differences in the rate at which each function changes with increasing values of x? This is like totally a different language for me, please help!!!!
1. f(x) = 5x - 3
2. f(x) = x2 - 3x + 2
3. f(x) = 2x3 + 7x2 - x - 1
4. f(x) = 10x
5. f(x) = ln x
Click here to see answer by stanbon(75887) |
|
Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 3871..3915, 3916..3960, 3961..4005, 4006..4050, 4051..4095, 4096..4140, 4141..4185, 4186..4230, 4231..4275, 4276..4320, 4321..4365, 4366..4410, 4411..4455, 4456..4500, 4501..4545, 4546..4590, 4591..4635, 4636..4680, 4681..4725, 4726..4770, 4771..4815, 4816..4860, 4861..4905, 4906..4950, 4951..4995, 4996..5040, 5041..5085, 5086..5130, 5131..5175, 5176..5220, 5221..5265, 5266..5310, 5311..5355, 5356..5400, 5401..5445, 5446..5490, 5491..5535, 5536..5580, 5581..5625, 5626..5670, 5671..5715, 5716..5760, 5761..5805, 5806..5850, 5851..5895, 5896..5940, 5941..5985, 5986..6030, 6031..6075, 6076..6120, 6121..6165, 6166..6210, 6211..6255, 6256..6300, 6301..6345, 6346..6390, 6391..6435, 6436..6480, 6481..6525, 6526..6570, 6571..6615, 6616..6660, 6661..6705, 6706..6750, 6751..6795, 6796..6840, 6841..6885, 6886..6930, 6931..6975, 6976..7020, 7021..7065, 7066..7110, 7111..7155, 7156..7200, 7201..7245, 7246..7290, 7291..7335, 7336..7380, 7381..7425, 7426..7470, 7471..7515, 7516..7560, 7561..7605, 7606..7650, 7651..7695, 7696..7740, 7741..7785, 7786..7830, 7831..7875, 7876..7920, 7921..7965, 7966..8010, 8011..8055, 8056..8100, 8101..8145, 8146..8190, 8191..8235, 8236..8280, 8281..8325, 8326..8370, 8371..8415, 8416..8460, 8461..8505, 8506..8550, 8551..8595, 8596..8640, 8641..8685, 8686..8730, 8731..8775, 8776..8820, 8821..8865, 8866..8910
|
