Melody

921 Questions
34315 Answers

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Mathigon website

I just discovered a site called mathigon

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

Melody Apr 2, 2022

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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

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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 ..

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Melody Mar 15, 2022

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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

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WELCOME BACK CPHILL !

Melody Feb 11, 2022

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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

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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 ..

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Melody Jan 9, 2022

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HAPPY BIRTHDAY CHRIS!

Melody Dec 20, 2021

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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

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Melody Nov 4, 2021

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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

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what is 60 percent of 5.2kg

60 divided by 100 x 5.2 kg

MelodyOct 11, 2013

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you can't, there are no equal signs.

MelodyOct 11, 2013

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Jim Beam, your method is a good one although the answer should have been 38.3 x 10 ⁵ ,
also it should then be changed back to scientific notation 3.83 x 10 ⁶ OR just written as an ordinary number.

(3.4 x 10^6) + (4.3 x 10^5)
The best way to do this on a calc is
3.4 exp 6 + 4.3 exp 5
If you use the exp button DO NOT put in any 10s.

MelodyOct 11, 2013

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Find the x-intercepts for y=3x^2+19x-40
The equation of the x axis is y = 0
So plug this into the formula
You can do it the way Jim Beam said to get an approximation or you can just use the quadratic formula to get the exact answers.

MelodyOct 11, 2013

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and a thank you to you too for your show of appreciation.
I am glad that I helped you.

MelodyOct 11, 2013

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9 1/8 what? And i assume you mean 1:50
anyway just multiply by 50 and keep the units the same.

MelodyOct 11, 2013

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The square root of the number of students.
Too bad if a some students need to be chopped into bits to acheive this.

MelodyOct 11, 2013

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Do you mean
1.24x10to the 5th divided by6.2x10 to the -third=?
Can you do it on your calc?
to put in 1.24x10 ₅
enter
1.24 exp 5
If the exponential is a fraction or negative, put it in brackets.

MelodyOct 11, 2013

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think about it

You know that 3 x 6 = 18
so how can you work out
3 x what = 18
I mean, how do you have to put the 3 and 18 together to get the 6 ?

Do the same for your queston.

MelodyOct 11, 2013

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18 7/8% = 18 7/8 divided by 100

MelodyOct 10, 2013