Melody

921 Questions
34315 Answers

+1

1

1742

2

+118725

Mathigon website

I just discovered a site called mathigon

https://mathigon.org/dashboard
read more ..

Melody Apr 2, 2022

-8

609

1

+118725

Reporting problems.

There are a number of people having problems at the moment.
If you lodge an error can you please give all relevant information that you can think of.
Where you are in the world - the city or the country - is often very important information. read more ..

Melody Mar 16, 2022

-2

8

1459

5

+118725

How to make an empty rectangle in Latex

I just worked out how to make an empty box of various horizonal size easily in LaTex.
This is not a recommended method, but other methods that I have tried here have not worked.
This coding is really simple. Just put letters inside read more ..

●●●●●

Melody Mar 15, 2022

-3

871

3

+118725

HAPPY ANNIVERSARY CHRIS! (CPhill)

I just realized that you became a member here exactly 8 years ago today!

It has been great to have you here all that time

off-topic

Melody Mar 13, 2022

-4

849

3

+118725

WELCOME BACK CPHILL !

Melody Feb 11, 2022

-5

717

2

+118725

Very interesting question. No high level maths required.

This question was posted a couple of days ago.
https://web2.0calc.com/questions/geometry_73561

I think it is really interesting. It looks much more difficult than it really needs to be. read more ..

Melody Feb 1, 2022

-7

889

11

+118725

Members have a better experience. Their questions get more attention.

Almost everyone is posting as a guest.
If you post as a member your questions will have a far greater chance of a timely and helpful response.
If you are a genuine learner and interact with us, you will become known and answerers will do read more ..

●●●●●●●●●●●

Melody Jan 9, 2022

-6

1

996

3

+118725

HAPPY BIRTHDAY CHRIS!

Melody Dec 20, 2021

+5

16

5552

9

+118725

Some guidelines for question askers.

Please note:
1) Ask only one question per post.
2) When asking a question talk about what you have tried for yourself. Then people will take you more seriously and will be more able and willing to help.
3) If you get an answer read more ..

off-topic

●●●●●●●●●

Melody Nov 4, 2021

-9

1091

1

+118725

Remeniscing - a little historical humour.

I just found this old post that some of you, who have been around for a while, might find amusing.

https://web2.0calc.com/questions/look-at-the-new-leader-board

off-topic

Melody Oct 29, 2021

+118725

0

Guest:
[size=150]Suppose The Population Of Deer In A Region Was 3,500 In The Year 2000. Since Then The Population Has Grown By 3.5 % Annually. What Will The Approximate Population Be In The Year 2020? Use This Equation Y= a*b^x When a Is The Starting Amount; b Is The Growth Rate; And x Is The Time Period.[/size]

Thanks Dms,

Let the year 2000 be year 0 x=0
and the year 2020 be year 20 x=20

As Dms said, a=3500, and b=0.035

so you have the equation

Y = 3500 * 0.035 ^x

Now just plug the numbers in

MelodyMar 7, 2014

+118725

0

zoe101:
is -11.0234 rational or irrational and why

Thanks Alan,

hi Zoe,
Any number that can be expressed as a terminating or recurring decimal can be expressed as a fraction.
And
all fractions are rational. (because as Alan said, they are the ratio of 2 whole numbers)

MelodyMar 7, 2014

+118725

0

Dms:
I am from Greece. So our time difference is quite large. I think, we'll continue also on this thread: http://web2.0calc.com/questions/viewtopic.php?f=2&t=9349

Okay. thank you. That is a good idea.

MelodyMar 6, 2014

+118725

0

Thank you that would be great.
Your English is good. Where are you from?

Could you get us started with some LaTex tips?
How DID you do that. It was very impressive!
Melody.

MelodyMar 6, 2014

+118725

0

grisi08:
23 is what percent of 74?

MelodyMar 6, 2014

+118725

0

Angelina:
A diving bell is lowered to a depth of -124 metres i.e. 124 metres below sea level. If it rises 38 metres and then drops a further 65 metres from this point what is its new depth?

hi Angelina,

-124+38-65 =

-124+38 this is going to get closer to the surface of the water so it will become LESS NEGATIVE. it will be -(124-38) = - 86

-86 - 65 is going to get a lot deeper so it must be like -(86+65) = -151

If you don't understand this I (or someone else) will try to explain it differently.

MelodyMar 6, 2014

+118725

+11

Hello all,
Many great answers were provided by Alan, reinout-g, I like Serena, guest, Mathgirl, Rom, JeanLand JimMath.
One of our guests gave a very nice thankyou. These are always appreciated.

This is Mathgirl's first day with us. We welcome you and we hope that you like it here.

If you use acrnyms in your answers could you please make a point of explaining what the letters stand for.
People do have to become familiar with many acronyms but they may not be familiar yet. Sometimes an explanation of what the words mean is also a good idea.

Reinout-g and I like Serena have been investigating possible LaTex editors. ILS has said that 'mathjax' is probably the best because it is usually used in other forums.
Reinout seemed to think that the Latex could probably be delivered via a [tex][/tex] box. Do you think that this is how it would be ILS? Also, do you know if mathjax is freely available? I am unlikely to sell the idea to Andre Massow if there is a cost involved. Reinout, do you have any more to add? I have bumped up the LaTex thread so if anyone has anything to say please add it to the thread. Once I am sure of what to ask for I will send another email to Andre regarding Latex. I have already sent 1 backup email to the original reply and I am concerned that if I send too many they will not be considered or even read. Latex is important to us so I will send the email. I just have to make sure it is right first.

If anyone, would like to learn LaTex, a show of interest is all it takes and we will be very happy to help you learn.
Even without the LaTex editor we use Latex regularly, almost every day I import snips from ouput that I have created with Latex.

That is it from me,
Enjoy the rest of your day.
Melody.

MelodyMar 6, 2014

+118725

0

MelodyMar 6, 2014

+118725

0

Guest:
P squared plus 3P - 28 =0 using quadratic formula

P ²+3P-28=0

a=1 b= 3 and c= -28

now just put the numbers in. Why are you having problems?

[input]x=(-3+sqrt(3^2-4*1*-28))/(2*1)[/input]
or
[input]x=(-3-sqrt(3^2-4*1*-28))/(2*1)[/input]

MelodyMar 6, 2014

+118725

0

jean:
why is the calculator rounding to only two decimal points ?

What calculator?
if it is your own you must have inadvertently 'fixed' it to 2 places.

MelodyMar 6, 2014