सदस्य: Melody

FatlumFerizi100:
Carl bought some dope for 25 000$ after 4 year the dope that he had once bought costs only 4000$ now. How much reduction in percent did the dope get reduced by yearly? If you don''t know the answer with calculation, do not attempt to help as it will only make it worse. Thanks for your help. (I have the answer, but I need to get the calculation and see the connection).

Hi FatlumFerizi100,

Future value = original value ( 1- yearly interest rate as a decimal) ^{numberof years}

4000 = 25000(1-r) ⁴

4000/25000 = (1-r) ⁴

0.16 = (1-r) ⁴

0.16 ^1/4 = 1 - r

r = 1 - 0.16 ^1/4

r = 0.3675....

The yearly depreciation is approx 36.8%

does that agree with your answer? Let me know if there is a problem or if you don't understand.

Melody27 Jan 2014

+118691

Danny:
positive square roots what are these what does the positive mean?

Hi Danny,
I am going to tackle these as 2 separate questions.

Think about temperature. In summer it is hot and the temperature might be 20 degrees C or 80 degrees F (depending on how your country measures temperature)
Either way it is a normal number. However, I could put a + in front of the number and say it is +20 or +80 degrees.
(If there is no sign at all in front of a number then a positive is implied. That means that it is positive but the + sign might be invisable)

Now, if it is very cold in winter the temperature might be negative10 degrees Celcius, it is writtten as -10 ⁰. (It never gets that cold where I live, but id does in lots of places)
That means it is even colder than 0 degrees.
You have probably used number lines at school the number on it are maked like
0,1,2,3,4,5,6,7, etc These are positive numbers, but the number line can go left from 0 as well.
My number line looks a little funny because the zero should look much more like the onther numbers. The up and down line at zero shouldn't be there. But i hope that you can see what I mean.
140127 number line.JPG
anyway, I hope that is negative numbers covered.
----------------------------------------------------------------------------------------------------------------------------------------
Now we will look at what a square root is
first I have to explain what the square of a number is.
6 x 6 = 6 squared = 6 ² =36
Another way of writing 6 squared (that you will often see in this forum or on a calculator is 6^2)
If you multiply any number by itself then you are squaring it.
If you get the sqare root of the answer then you will go back to your original number.
so 6 ²=36 therefore square root of 36 is 6
square root of 36 can be written as sqrt(36) there is also a maths symbol that you can use but I have to attach another picture to show you that
140127 sqrt36.JPG

I hope that all helps

Melody27 Jan 2014

+118691

YaBoii:
its like s**t in your mouth dickwad

YaBoii, Your behaviour is completely unacceptable.
If you can not conduct yourself politely then DO NOT RETURN to this forum.
If you clean up your act and behave appropriately then you are very welcome to stay.

Melody27 Jan 2014

+118691

Sorry,
I have no idea what your question is.

Melody27 Jan 2014

#18

+118691

+20

Well, my Saturday is finished. It is even later in New Zealand, that is, just after midnight, Sunday morning.
But, almost everywhere else in the world is behind Sydney (in time, that is).

We had some great answers today from Anonymous4338, Anonymous#16, Princess Sophie and Kitty<3
I like Serena and DavidQD also gave Princess Sophie great answers on her difficult question from yesterday.
Thankyou everybody. You all did a great job
----------------------------------------------------------------------------------------------
Please when you write your questions could you be very careful to use brackets to make your meaning clear.
Too many brackes is usually less confusing than too few. Just try to keep that in mind.
good night.

Melody26 Jan 2014

+118691

Anonymous4338:
Currently, I am a 10-year old fifth grader, but I'm not sure what math topic to work on.
I have just finished working on pre-algebra. Anyone have suggestions for math topics?

Hi Anonymous4338,
I have been thinking about your question today. There are so many possibilities and I don't know what you can already do.

1) You could learn about Pythagoras's theorem. That is really important. If you do some googling you could even present the forum with a proof. That would be really cool
2) Are you comfortable with negative numbers? They are important.
3) I know that you can manipulate algebra a little bit but maybe some more of that (with equations) might be good.
4) After that I think you should look at number plane work.

Where are you getting your learning material from? There are some great sites around like mathsisfun.com That is a really great site.
http://www.mathsisfun.com/index.htm
Also there are some really good you tube clips, but you usually need to know what you want first.
Another suggestion is that you look at other people's post in here and look at the answers. I know quite a few people learn this way.
It might also give you insight into what you would like to go off and learn more about yourself.

I hope that this helps.

Melody26 Jan 2014

+118691

Guest:
the target capital structure for Qm industries is 44% common stock 13% preferred stock and 43% debt. If the cost of common equity for the firm is 18.4% the cost of the preferred stock is 10.4% the before tax cost of debt is 8.8% and the firm rate is35% what is the Qm's weight average cost of captial.

I am sorry, I really don't know. There is no one in this forum, that i know of, who would be comfortable with this question.
I strongly suggest that you post this question is mathhelpforum.com (where you are much more likely to get an answer) or perhaps in an economics forum.
If you choose to use one of these 'older' forums you should know that you will be expected to be interactive with your learning. When you post your question you should talk a little about what you already know or what exactly you don't understand.

Sorry but that is the best I can do.

Melody26 Jan 2014

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