116 items are filed under this topic.
 |
|
|
|
|
|
|
|
|
UFO speed in MPH from nearest galaxy in one year |
2021-05-22 |
|
From Joe:
If the next closest galaxy is 15 quadrillion miles away and there are 8760 hours
in one year; how fast would a UFO have to fly to travel from the next
galaxy, in MPH in one year ?
Google calculator gives this result: 1.7123288e+12
I don't understand what the "e+12" means.
How is that pronounced, ex. trillion, quadrillion etc..?
Answered by Harley. |
|
|
|
|
|
|
Power notation |
2020-04-26 |
|
From Aditi:
The power notation of -1 / 128
Answered by Penny Nom. |
|
|
|
|
|
|
The exponential form of sqrt(13) |
2019-02-10 |
|
From isaebl:
what is the exponential form of sqrt(13)
Answered by Penny Nom. |
|
|
|
|
|
|
Exponential form |
2018-09-14 |
|
From Saquanna:
What is 25 in exponential form
Answered by Penny Nom. |
|
|
|
|
|
|
Exponential form |
2018-09-12 |
|
From Grace:
hi, I can't figure out how to do 735 in exponential form. note that im only in 5th grade and its not supposed to be in the scientific notation or whatever. okay, thanks!
Answered by Penny Nom. |
|
|
|
|
|
|
The square root 3 in exponential form |
2018-05-09 |
|
From Paige:
how do you write the square root 3 in exponential form
Answered by Penny Nom. |
|
|
|
|
|
|
Exponential form |
2017-11-25 |
|
From Sherry:
What is the exponential form of 3sqrt 15?
Answered by Penny Nom. |
|
|
|
|
|
|
Exponential form |
2017-07-06 |
|
From estela:
what is exponential form of 9×1000
Answered by Penny Nom. |
|
|
|
|
|
|
Exponential form |
2017-03-04 |
|
From michael:
I was teaching my student about exponent when we stumbled across this problem.
"write (-125)^-3 in exponent form"
The problem is with the number "-125". I think -125 = (-5)^3. But one of my student thought that it is -125= -5^3.
Both of them is equal to -125 but they totally different in structure. I wonder which one is correct and why it is. I am worried if they get this wrong, it might spell problem in the future when we start substituting the numbers with variable.
Thank you very much for reading my question and answering it.
Answered by Penny Nom. |
|
|
|
|
|
|
Exponential form |
2016-08-31 |
|
From Lily:
Hi! I was wondering, I was having a little issue understanding this one problem. It was "write 81 in exponential 2 different ways" and I already got 9(2) but I was wondering what the second one could be! Thanks! -Lily
Answered by Penny Nom. |
|
|
|
|
|
|
Exponential form |
2016-01-26 |
|
From Jufe:
What is the exponential form of ³√11x²
Answered by Penny Nom. |
|
|
|
|
|
|
Exponential growth |
2016-01-26 |
|
From Paul:
The value of a stamp was 0.03 in 1851. The value in 2011 is $50,000. If the value increased exponentially, what is the annual growth rate?
Answered by Penny Nom. |
|
|
|
|
|
|
Exponential form |
2015-10-17 |
|
From Will:
What is exponential form of -8?
Answered by Penny Nom. |
|
|
|
|
|
|
Exponential notation |
2014-11-27 |
|
From Jaqui:
May sound super easy, but how would you SHOW that you simplified
3x3 to the power of 2 (the little 2)?
thank you!
Jaqui
Answered by Penny Nom. |
|
|
|
|
|
|
Prime factorization in exponent form |
2014-10-31 |
|
From Emma:
I need to find out how to make a prime factorization of 120 in exponential form.
Answered by Penny Nom. |
|
|
|
|
|
|
What is the exponential form of 1/square root of 6v? |
2014-02-16 |
|
From Prince:
What is the exponential form of 1/square root of 6v
Answered by Penny Nom. |
|
|
|
|
|
|
Prime factorization |
2014-02-06 |
|
From Kadeejah:
Write the prime factorization of 37 in exponential form
Answered by Penny Nom. |
|
|
|
|
|
|
Exponential form |
2013-12-01 |
|
From Alina:
My question says to express each number in exponent form in as many different ways as I can; 16, 81 and 64. How do I do this?
Answered by Penny Nom. |
|
|
|
|
|
|
How do i write log_8(P) =7 in exponential form? |
2013-04-14 |
|
From nancy:
How do i write this in exponential form log8P =7
Answered by Penny Nom. |
|
|
|
|
|
|
Exponential form |
2013-02-05 |
|
From Sandra:
What is 37,008 in exponential form? Help me please!!!
Answered by Penny Nom. |
|
|
|
|
|
|
What's your secret? |
2012-11-11 |
|
From ryan:
Tuscan school has a fair. At the fair, Pia plays "what's your secret?
The game starts with 3 players who are told the same secret.
Each of those 3 players tells another 3 player, and so on.
At the end of the 3rd round, everyone who knows the secret
will compare what they have heard. What number in exponent form
represents the number of people who know the secret after 3 rounds?
How many people is that?
Thank you very much.
P.S. I got 3 cube. which is 27
But when i map it out I end up with 39.
Answered by Penny Nom. |
|
|
|
|
|
|
Exponential form |
2012-09-04 |
|
From angie:
How do i write 9^-5 in exponential form?
Answered by Penny Nom. |
|
|
|
|
|
|
Exponntial form |
2012-08-30 |
|
From Robin:
My math teacher has asked the question:
"Write mmmxxjmyy2 in exponential form"
How would you solve this problem?
Answered by Penny Nom. |
|
|
|
|
|
|
The exponential function form f(x)=a^x |
2012-08-13 |
|
From Lucy:
Hi,
Why does the "a" value in the exponential function form f(x)=a^x have to be negative?
Answered by Penny Nom. |
|
|
|
|
|
|
Expanded exponential form? |
2012-06-12 |
|
From Ramon:
express the numbers 990 614 000 005 in expanded exponential form.
Answered by Harley Weston. |
|
|
|
|
|
|
The spread of a rumor |
2012-04-09 |
|
From Roohi:
The function f(t) = a/(1+3e^(-bt)) has also been used to model the spread of a rumor. Suppose that a= 70 and b=3 0.2. Compute f(2), the percentage of the population that has heard the rumor after 2 hours. Compute f'(2) and describe what it represents. Compute lim t approaches infinity and describe what it represents.
Answered by Penny Nom. |
|
|
|
|
|
|
Radioactive decay |
2012-04-02 |
|
From Christy:
Hello, how do I go about answering this question?
Should I be using the formula Ce^(kt)?
Given that the decay constant for Radium is -.000428/year, how long, to the nearest year, does it take a sample to decay to 15% of its present mass?
Answered by Penny Nom. |
|
|
|
|
|
|
Exponential form |
2012-01-15 |
|
From Helen:
How do you write (1/x) in exponential form?
Answered by Penny Nom. |
|
|
|
|
|
|
Exponential form |
2011-12-12 |
|
From Zoey:
What is the exponential form of 1/8??
Answered by Penny Nom. |
|
|
|
|
|
|
I started with Euler's identity and manipulated it |
2011-11-14 |
|
From anonymous:
I started with Euler's identity and manipulated it
e^i*pi=-1
e^-i*pi=(-1)^-1
e^-i*pi=-1
e^-i*i*pi=(-1)^i
e^--pi=(-1)^i
e^pi=(-1)^i
type it in in a calculator and you get e^pi=23.1406926... and
(-1)^i=0.0432139183... What did I do wrong?
Answered by Robert Dawson. |
|
|
|
|
|
|
A log equation in exponential form |
2011-11-11 |
|
From Sarah:
Express the equation in Exponential form
log2 to the 16th power=4
Answered by Penny Nom. |
|
|
|
|
|
|
Exponential form? |
2011-08-30 |
|
From Emily:
I have a 6th grader that needs to find out what is the exponential form of 461,885,811
Answered by Penny Nom. |
|
|
|
|
|
|
Exponential form |
2011-08-23 |
|
From kiara:
The African bush elephant is the largest land animal and
weighs about 8 tons . Write the amount in exponential form .
Answered by Robert Dawson. |
|
|
|
|
|
|
Exponential form |
2011-05-18 |
|
From Kara:
How do I write this in exponential form?
log 1/8 = -3
Answered by Penny Nom. |
|
|
|
|
|
|
(7cubed * 8(exponent6))exponent 6 |
2011-01-29 |
|
From Shalaine:
What is the exponential form of (7cubed•8(exponent6))exponent 6?
Answered by Penny Nom. |
|
|
|
|
|
|
Exponential form |
2011-01-02 |
|
From jumana:
find any five examples of exponential form from real life situation
Answered by Penny Nom. |
|
|
|
|
|
|
Powers |
2010-10-20 |
|
From dylan:
how do you write 20736 in exponential form .same for 1728 and 50625.
is there a formula to figure out how to express large know numbers in exponential form.
Answered by Penny Nom. |
|
|
|
|
|
|
An exponential equation |
2010-10-19 |
|
From Sandi:
Question from sandi, a student:
I have several questions similar to this one and was wondering if you could walk me through this one. I'm totally lost on how to do it.
Paramecia reproduce by splitting in two. In a laboratory flask, a colony of paramecia had an initial population of 500. Each day, the population of the paramecia was counted. The results are as listed.
Time (in days)------Population
0-----------------------500
1-----------------------600
2-----------------------720
3-----------------------864
4----------------------1037
5---------------------1244
6---------------------1493
7----------------------1792
8---------------------2150
1.)Using graphing calculator make a scatter plot of the data in table.
I think I did this part right I set my window at Xmin=0 Xmax=10 Xscl=1 Ymin=0 Ymax=2500 Yscl=100 Xres=1
2.) Determine an exponential equation to represent the population as a function of time without using a graphing calculator.I have no clue how to do this.
3.)Suppose the flask and food supply is large enough to support the trend of the population growth. Estimate the population of the colony when the time is 10 days.
Answered by Penny Nom. |
|
|
|
|
|
|
Exponential form |
2010-10-06 |
|
From celina:
what is the exponential form of 4x*4x
Answered by Penny Nom. |
|
|
|
|
|
|
Exponential form |
2010-08-24 |
|
From Courtney:
What the Exponential form? For Ex. X2*X5*X4??
Answered by Penny Nom. |
|
|
|
|
|
|
Exponential form |
2010-06-16 |
|
From charlotte:
what is the exponential form of 6x6x6x5x5x5x5=
Answered by Robert Dawson. |
|
|
|
|
|
|
graph y=(2x^2-3x)e^ax |
2010-05-31 |
|
From James:
graph y=(2x^2-3x)e^ax
Answered by Robert Dawson. |
|
|
|
|
|
|
Exponential form |
2009-09-18 |
|
From karen:
Q: Write the following in exponent from: a * a * a * a * * * a, where there are n -1 a's
note: *asterisk means times.
Answered by Penny Nom. |
|
|
|
|
|
|
Exponential form |
2009-09-08 |
|
From hanna:
hi,
well i am really bad in math and i have a math paper and i was just
wondering what 3x3x3x3x3 was in exponential form and what is
exponential in a way a person like me would understand?
Answered by Penny Nom. |
|
|
|
|
|
|
What is 8 tons in exponential form? |
2009-09-01 |
|
From Tyler:
what is 8 tons in exponential form
Answered by Penny Nom. |
|
|
|
|
|
|
Exponential form |
2009-08-31 |
|
From cecil:
what is the exponent form 564000?
Answered by Stephen La Rocque and Harley Weston. |
|
|
|
|
|
|
Fitting the curve y=a*exp(b*x)+c |
2009-08-12 |
|
From aika:
Could one show me the complete algorithm and formula for finding the coefficients (a,b, and c) in exponential regression model
y=a*exp(b*x)+c
Answered by Robert Dawson. |
|
|
|
|
|
|
Exponential form |
2009-08-05 |
|
From motaz:
Let x = log_2 1/8 Write the exponential form of the equation and solve the equation for x
Answered by Stephen La Rocque. |
|
|
|
|
|
|
Exponential form |
2009-04-16 |
|
From Pete:
Hi,
How do you express ³√h^-4 in exponential form. I am having a lot of
trouble with this one.
thanks
Pete
Answered by Stephen La Rocque. |
|
|
|
|
|
|
Grain of rice on a chess board |
2009-03-30 |
|
From andy:
Is there an easy way for my students to find out 8 to the power of 21 to solve the grains of rice doubling investigation on a chessboard? Any suggestions welcome. Thanks very much
Answered by Robert Dawson and Claude Tardif. |
|
|
|
|
|
|
What is i^i? |
2008-12-27 |
|
From randomness:
i have learnt that 'i' is square root of -1. What is then i^i ? It baffles my maths teacher...
Answered by Robert Dawson and Penny Nom. |
|
|
|
|
|
|
Exponential form |
2008-10-21 |
|
From layla:
how we wite 256 in exponential form
Answered by Harley Weston. |
|
|
|
|
|
|
Logs and exponentials |
2008-10-06 |
|
From Charles:
I seem to remember you could solve exponential problems using natural logs quite simply without calculators, such as the fifth root of 400 or 33 to the 4th power. All you did was convert the number to its natural log and then just divide by 5 or multiply by 4 and then convert it back. I just remember how to do this. Thanks.
Answered by Harley Weston. |
|
|
|
|
|
|
Exponential form |
2008-09-25 |
|
From Pat:
The African bush elephant is the largest land animal and weighs about 8 tons. Write this amount in exponential form.
Answered by Penny Nom. |
|
|
|
|
|
|
Exponential form |
2008-09-16 |
|
From shawn:
Write the product in exponential form: 5.5.5.2
Answered by Penny Nom. |
|
|
|
|
|
|
What is the derivative of (2^sinx)/(logbase4(2x+1))? |
2008-09-16 |
|
From Jesse:
What is the derivative of (2^sinx)/(logbase4(2x+1))
Answered by Harley Weston. |
|
|
|
|
|
|
Solving Exponential Equations Using Logarithms |
2008-09-15 |
|
From Todd:
7(6^x)=6e^-2x
Answered by Janice Cotcher. |
|
|
|
|
|
|
1,679,616 as a power of 6 |
2008-09-03 |
|
From Denise:
express 1,679,616 in exponential form as a power of 6.
Answered by Penny Nom. |
|
|
|
|
|
|
Solve e^x + e^(x+1) = 250 |
2008-08-25 |
|
From Laura:
"solve this equation correct to three decimals"
e^x + e^x+1= 250
Answered by Penny Nom. |
|
|
|
|
|
|
Right Sided Limit of an Exponential Function |
2008-07-29 |
|
From joseph:
I am trying to find the limit as X approaches 0 from the positive side of x to the sin of x
which look like this lim x^sinx
x->0+
Answered by Harley Weston. |
|
|
|
|
|
|
Exponential form |
2008-07-03 |
|
From Kent:
How to write 8 365 005 106 in expanded and exponential form? May I request you also to explane how does it solve.
Answered by Stephen La Rocque. |
|
|
|
|
|
|
Write log_2 (1/8) = -3 in exponential form |
2008-06-27 |
|
From Jaime:
how do you write log2 (1/8) = -3 in exponential form?
the 1/8 is a fraction and the 2 is a base of 2
Answered by Penny Nom. |
|
|
|
|
|
|
The cube of -2y in exponential form |
2008-05-19 |
|
From Xiu:
I dont get this question..
Write "the cube of -2y" in exponential form. I know the answer is -(2y)^2 but i really don't understand why. Can you explain how to do this whole problem for me?
Answered by Leeanne Boehm. |
|
|
|
|
|
|
The inverse of a function |
2008-05-03 |
|
From keith:
please help me find the inverse of this function:
h(t) = 2 + 4 ln(1-5t)
Answered by Stephen La Rocque. |
|
|
|
|
|
|
The exponential form of x radical y to the third power |
2008-03-30 |
|
From Jennifer:
what is the exponential for of x radical y to the third power
Answered by Penny Nom. |
|
|
|
|
|
|
Exponential form |
2008-02-16 |
|
From annna:
i already got the answer for what is the prime factorization of 648 which is 2x2x2x3x3x3x3
but how do i write that answer in exponential form?
Answered by Penny Nom. |
|
|
|
|
|
|
Growth factor and growth rate |
2008-02-13 |
|
From william:
what is the difference between growth factor and growth rate?
Answered by Stephen La Rocque and Harley Weston. |
|
|
|
|
|
|
How do I write the following in exponential form? |
2008-01-09 |
|
From Mandy:
How do I write the following in exponential form?
( square root of a^-2 b)^5
Answered by Penny Nom. |
|
|
|
|
|
|
Exponential form |
2008-01-08 |
|
From liam:
i was wondering if anyone could help me with this question and tell me how and what the did; exponetial form of 4 326 180 501
Answered by Stephen La Rocque. |
|
|
|
|
|
|
Multiplying exponentials |
2008-01-02 |
|
From jessie:
Can you please explain how to put x^3 y^2 times x^1 y^3 in simplest exponential form?
Answered by Penny Nom. |
|
|
|
|
|
|
Radicals in exponential form |
2008-01-02 |
|
From Andre:
The title of the section in my textbook is to write each of the following
radicals in exponential form.
My question is how do u write the squareroot of 10 in exponential form?
Answered by Penny Nom. |
|
|
|
|
|
|
Exponential form |
2007-11-30 |
|
From Sasha:
How do I write the number 127398 in exponential for?
Answered by Penny Nom. |
|
|
|
|
|
|
Exponential Growth |
2007-11-19 |
|
From lisa:
Hi i am a 8th grader who is learning about algebra
and we are having test on exponent and i don't really get it
i asked my teacher and she told me i should pay more attention
so i want to know what exponential Growth means
Answered by Penny Nom. |
|
|
|
|
|
|
Exponential form |
2007-11-16 |
|
From ashley:
write a sentence for exponential form.
Answered by Penny Nom. |
|
|
|
|
|
|
Doubling every day |
2007-10-07 |
|
From Jerrie:
Patti saved pennies for 10 days. The first day she saved 1 cent. Every day after that she saved twice as much as the day before. How much money did Patti save altogether?
Answered by Stephen La Rocque. |
|
|
|
|
|
|
Exponents |
2007-09-26 |
|
From Calvin:
Exponential form
5 3exponent x 5 4exponent divide 5 2exponent
Answered by Stephen La Rocque. |
|
|
|
|
|
|
Exponential regression |
2007-09-24 |
|
From Anonymous:
I need help in finding this. Find a formula for exponential regression.
Determine how to calculate a and b in the formula.
Y = ba^x
where y is as a function of x.
Answered by Penny Nom. |
|
|
|
|
|
|
Exponential form |
2007-09-12 |
|
From Ericha:
How do I express 1,679,616 in exponential form as a power of 6 using a calculator?
Answered by Stepehe La Rocque and Penny Nom. |
|
|
|
|
|
|
Prime factors in exponential form |
2007-09-06 |
|
From Michelle:
how would you write this: factor 48 as a product of primes written in exponential form
Answered by Stephen La Rocque. |
|
|
|
|
|
|
Exponential form |
2007-09-05 |
|
From jeanette:
the African bush elephant is the largest animal and weighs 8 tons. write this amount in exponential form.
Answered by Stephen la Rocque and Penny Nom. |
|
|
|
|
|
|
Exponential form |
2007-08-31 |
|
From Victoria:
The cost of each space shuttle is about $10,000,000.
Write this amount in exponential form.
Answered by Stephen La Rocque. |
|
|
|
|
|
|
Exponential form |
2007-08-29 |
|
From Emily:
Write the Exponential Form of 125 x 25 and 81 x 27.
Answered by Stephen La Rocque. |
|
|
|
|
|
|
Exponential form: x^y |
2007-06-22 |
|
From Kishor:
whats the easy way to calculate X raised to Y where y is much greater than x.
Answered by Stephen La Rocque. |
|
|
|
|
|
|
Understanding log equations |
2007-05-10 |
|
From Sean:
The number, N, of people who have heard a rumor spread by mass media at time, t, in days is modelled by N (t) = a / 1+ be^ -kt. If 50 people have heard the rumour initially and 300,000 people hear the rumour eventually, find a and b. If the rumour is initially spreading at the rate of 500 people per day, find k.
Answered by Penny Nom. |
|
|
|
|
|
|
Exponential form |
2007-04-16 |
|
From Cassia:
I was just wondering, how do you write the squared root of 7x(to the 5th) in
exponential form? If you could help explain that I'd be grateful. Thanks
Answered by Brennan Yaremko. |
|
|
|
|
|
|
exponential decay of Carbon-14 |
2007-03-12 |
|
From Christine:
How do I set up the exponential decay formula for Carbon 14 with an initial amount of 1500 grams.
Answered by Stephen La Rocque. |
|
|
|
|
|
|
Exponential form of complex numbers |
2007-02-12 |
|
From Austin:
When dealing with imaginary numbers in engineering, I am having trouble getting things into the exponential form. The equation is -1+i now I do know that re^(theta)i = r*cos(theta) + r*i*sin(theta). Just not quite understanding the order of operations. Thanks
Answered by Penny Nom. |
|
|
|
|
|
|
After how many hours will the class have been notified? |
2006-11-10 |
|
From Brittany:
A college math class consists of 32 students. On Monday at 9:00 a.m., the teacher tells one student to notify other students that the test scheduled for Wednesday at 9:00 a.m. has been cancelled. The model for the number of students in the class who will have heard this information after t hours is N=32-32e^-0.02t. After how many hours will the class have been notified?
Answered by Stephen La Rocque. |
|
|
|
|
|
|
Putting things in exponent form |
2006-10-18 |
|
From Sheila:
Write in exponential form 2 sq. root a with an exponent 5.
I do not understand on how to do it.
Answered by Stephen La Rocque. |
|
|
|
|
|
|
Geometric sequence and basic functions (graphs) |
2006-04-20 |
|
From Marlene:
Which of the basic functions is related to the geometric sequence:
Linear, Quadratic, Rational, or Exponential?
Can you give me an example of how it would be used in normal life?
Answered by Stephen La Rocque. |
|
|
|
|
|
|
An exponential function |
2006-04-03 |
|
From Meadow:
The graph of an exponential function passes through the points (0,1) and (4,10) find the constant of growth or decay. State the function.
Answered by Stephen La Rocque. |
|
|
|
|
|
|
Exponential decay |
2006-03-29 |
|
From Casey:
Fifty milligrams of a drug was injected into a patient at 6am. The drug is known to be eliminated according to the law of exponential decay. At 8.30am it was determined that 60% of the drug remained in the body. How many milligrams will remain in the body at midday?
Answered by Penny Nom. |
|
|
|
|
|
|
Express t as a function of d |
2005-11-30 |
|
From Matthew:
I have a problem on my homework I cant seem to figure out. Basically it gives me this Linear Regression Equation:
ln t=1.5 ln d-0.8954
and it wants be to transform the equation expressing t as a function of d. For some reason I keep getting it wrong. Anyone got an idea of how to do this?
Answered by Penny Nom. |
|
|
|
|
|
|
2^10 = -1/2^x - 1 |
2004-12-13 |
|
From Randy:
Could you explain to me how the following equation is solved please.
2^10 = -1/2^x - 1
Answered by Harley Weston. |
|
|
|
|
|
|
e = ln(b/a) solve for a |
2004-12-01 |
|
From Daniel:
I am trying to make "a" the subject of this equation "e = ln(b/a)" but am not sure if i'm doing it right. Any help would be appriciated,
Answered by Claude Tardif. |
|
|
|
|
|
|
x = 2^x |
2004-07-12 |
|
From A student:
If the graphs of y=x and y=2x are drawn on the same set of axes, they will intersect when x is equal to what?
(1)1
(2)2
(3)0
(4)They won't intersect.
I know the answer is number 4 by graphing which is permitted; however, I would like to know if there is any algebraic way to do this type of problem.If yes, please show me how.Thanks.
Answered by Penny Nom. |
|
|
|
|
|
|
A sequence that converges to e |
2003-03-16 |
|
From Dane:
Something I noticed fooling around with a calculator about 30 years ago.
Considering e = 2.718281828459045....
Using Window's Calculator you will find
1.111 = 2.8531167...
1.01101 = 2.731861...
1.0011001 = 2.71964085...
1.000110001 = 2.71841774...
1.00001100001 = 2.7182954...
1.00000110000011 = 2.178231875...
1.000000110000001 = 2.178219643...
There apears to be a pattern. My conjecture is:
1.'infinite number of zeros'11'infinite number of zeros'1 = e.
Answered by Penny Nom. |
|
|
|
|
|
|
Exponential notation |
2002-10-19 |
|
From Ivy:
I understand how to figure out for example 4 to the power of 3,what I don't understand is how to figure it out using both negative numbers and negative exponents,as an exaple -4 to the power of 6 and what makes this different that (-5) to the power of 7,please help me if you can.I am an adult taking correspondence and finding it quite frustrating.
Answered by Penny Nom. |
|
|
|
|
|
|
Exponential form |
2001-12-11 |
|
From Crystal:
Hi, I am asking a question on behalf of a homeschooling grade 11 student. She is having trouble with changing something like (3-4)2 into a exponential form. First of all she needs to know what the term means "exponential form" and then the process of it.
Answered by Penny Nom. |
|
|
|
|
|
|
Earthquake warning |
2001-09-03 |
|
From Dillon:
In the city of Skangai there are 6 million people.Each person has to tell 2 more people that theres going to be an earthquake. After they do they leave the city. There will be no duplications.It takes 3 minutes to tell each person. How long will it take for the whole city to know about the earthquake?
Answered by Penny Nom. |
|
|
|
|
|
|
Exponential form |
2001-06-06 |
|
From A student:
Hello can u please answer my question what is the exponent form of 8x8x8x8
Answered by Penny Nom. |
|
|
|
|
|
|
Conservation, consumption and population growth |
2001-06-04 |
|
From Steve:
I'm trying to quantify the relation between conservation/consumption and population growth. For instance let's consider California: The 2000 census states that California's population grew from 29,760* in 4-1990 to 33,871 in 4-2000. I want to find r or rate of growth per year. Based on the exponential growth formula for population growth:
.
.
.
Answered by Penny Nom. |
|
|
|
|
|
|
Graphing F(x) = 3x |
2000-11-06 |
|
From Jose:
graph the exponential problem F(x)=3x
Answered by Harley Weston. |
|
|
|
|
|
|
Radioactive decay |
2000-05-18 |
|
From Catherine Sullivan:
Please help me with the following: The radioactive isotope carbon-14 is present in small quantities in all life forms, and it is constantly replenished until the organism dies, after which it decays to carbon-12 at a rate proportional to the amount of C-14 present, with a half life of 5730 years. Suppose C(t) is the amount of C-14 at time t. - Find the value of the constant k in the differential equation: C'=-kC
- In 1988 3 teams of scientists found that the Shroud of Turin, which was reputed to be the burial cloth of Jesus, contained 91% of the amount of C-14 contained in freshly made cloth of the same material. How old is the Shroud according to the data?
Answered by Harley Weston. |
|
|
|
|
|
|
A colony of bacteria |
2000-04-22 |
|
From Nicci Demmin:
Suppose that the bacteria in a colony can grow unchecked, by the law of exponential change. The colony starts with one bacterium and doubles every half hour. How many bacteria will the colony contain at the end of 50 hours?
Answered by Penny Nom. |
|
|
|
|
|
|
y = x^x^x^x... |
2000-04-05 |
|
From Michael Hackman:
Find the derivative of: y = x^x^x^x... on to infinity.
Answered by Claude Tardif. |
|
|
|
|
|
|
Compounding continuously |
2000-03-21 |
|
From Gina:
You deposit $1500 in an account that pays 6.5% annual interest, compounded continuously. Find the balance after 10 years. I'm not sure what to do with the "compounded continuously" part.
Answered by Penny Nom. |
|
|
|
|
|
|
Functions that satisfy f' = f |
2000-03-16 |
|
From Kevin Palmer :
Recently my calculus teacher asked his students to try and find any functions whose derivatives where the exact same as the original function. The only function then I have determined that statement to be accurate in is all the natural exponential functions. Ex. f(x) = ex, f'(x) = ex If possible could you please email me all the functions that you can find in which the original function and its derivative is identical.
Answered by Claude Tardif. |
|
|
|
|
|
|
Log Cancel |
1999-12-03 |
|
From Justin Murray:
Ok I feel like a goof because I know this and I cant think of an answer But I want to isolate the x in the function y=2^x how do I do this?
Answered by Harley Weston. |
|
|
|
|
|
|
Zero to the zero |
1999-12-02 |
|
From A middle school teacher:
I am a middle school teacher who is looking for a precise explanation of why zero raised to the zero power is undefined. I am hoping to get an explanation using something other than the fact that diividing by zero is undefined.
Answered by Penny Nom. |
|
|
|
|
|
|
Get rich quick |
1999-12-02 |
|
From Holly Hutson:
If one cent were placed in an investment that doubles in value every day, what would be the value of the investment at the end of 30 days?
Answered by Penny Nom. |
|
|
|
|
|
|
A matching quiz |
1999-11-20 |
|
From William J. Ricciardi:
I gave a matching quiz the other day and one of my students got all 9 incorrect. That got me thinking......What is the probability that someone could get all 9 questions incorrect?
Answered by Peny Nom. |
|
|
|
|
|
|
Two derivatives |
1999-11-16 |
|
From Gina Renicker:
The derivative of: y=e(xlnx) and y=x2arctan(x1/2)
Answered by Harley Weston. |
|
|
|
|
|
|
2 to the x and x squared |
1999-09-17 |
|
From John:
For what values of x is 2 to the exponent x greater than x squared?
Answered by Harely Weston. |
|
|
|
|
|
|
Slopes of curved lines |
1999-06-09 |
|
From Stephen Ehrler:
When one plots the graphs of y=2x, y=3x, y=xx When each of these graphs pass through point (0,1) do they have the same slope? I know they are different lines but is it possable that they have the same slope at point (0,1).
Answered by Harley Weston. |
|
|
|
|
|
|
Natural Logarithm Functions |
1997-04-23 |
|
From Rickson:
The following two questions are some of my son's homework that he is having trouble with......any advice or assistance would be appreciated. (eX)5=1000.............the X and 5 are exponents lnx + ln(x+3) = ln10 In each question the problem is to find x.
Answered by Harley Weston. |
|
|
