Member: Melody

Alan:
peace706:
does any know a really good online calculator to use for line of best fit questions?

Try this one; http://www.alcula.com/calculators/statistics/linear-regression/

Thanks Alan,
I didn't google it I will admit but I was wondering what the answer was.

MelodyApr 2, 2014

+118725

Thanks Sam,
I think I will have to play it at least 20 times just to work out what on Earth it is doing.
(and that is being conservative)

MelodyApr 2, 2014

+118725

Helpless2020:
Calculate two months' gross income for a dentist with a Annual income of 131379$ per year

There are 12 months in a year and you want 2 months worth of income so

2/12 * 131379

Two months gross income is $21,896.50

MelodyApr 2, 2014

+118725

Guest:
tan^-1(5/7)

Inverse tan is the same as arctan

tan ^-1(5/7) can be written atan(5/7)

You use inverse tan when it is the angle that you are finding. You would use tan if you had the angle and needed to find a side.

atan(5/7)

If you were doing this on most hand held calculators you could press the 'degrees minutes seconds' button to convert it to that form.

MelodyApr 2, 2014

+118725

mimi:
2/10 = 0

Not in my universe.

MelodyApr 2, 2014

+118725

dad:
what is pi times 2

3.14159*2
This is an approximation.
Pi is an irrational number so it can't be written exactly with digits.

MelodyApr 2, 2014

+118725

Square both sides then solve it as a quadratic.

MelodyApr 2, 2014

#89

+118725

Hello,
There were very few questions today but good answers were given by Alan, Samgelinas, Bertie and CPhill. Thanks you.
I like Serera threw out a animation challenge, Maybe someone would like to give it a go. Thanks ILS
http://web2.0calc.com/questions/someone-should-animate-this

The last couple of weeks the forum has been shrinking. Three weeks ago there were many more questions.
At present there is so little happening that I see no point in doing a wrap every night.
I don't want the information posts to 'fall off the page' So I may only do a wrap when this is imminent or when I have something particular to say.
If anyone wants to comment on this in the body of the forum or by private message your viewpoint will be welcome.
I have no objection to doing the wrap every night but at present it just does not seem to be justified.
Kind regards to all,
Melody.

MelodyApr 1, 2014

+118725

Destinee_Angel:
How much is $600.00 us dollars in Euro's?

hi destinee_Angel

Look here.
http://www.convertmymoney.com/?gclid=CJWexY-Pvr0CFZaVvQodCAoALA

MelodyApr 1, 2014

+118725

abh782:
An airplane cruising at an altitude of 3500m and a submarine at a depth of 975m. What is the difference?

Hi abh782,

3500m above the water PLUS 975m below the water makes 3500m + 975m

Alternatively difference means take away. The big one take away the little one.

3500 - (- 975) = 3500 - - 975 = 3500 + 975.

MelodyApr 1, 2014

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