All Answers 358129 Answers

Thanks Miss Melody, and you too Alan.

Thansk Dragonlance 

but what is philosophical concept? and how can there be 150%.

I still don't understand  

One is a philosophical concept and the other is a mathematical one.

If someone say they want you to do 110%. It just means they want you to do better than you think you are able to.

It is true that most people can do more than they think they can.That is how we learn.

Now for a third good answer

142.5% of 20

% means out of 100  it even has a one and 2 zero!   and of means  multiply so if I convert this to maths speak I get

142.5/100*20      

Thanks Chris :)

Thank you Alan.

I didn’t know that ice and steam could exist together in the same place. That temperature is so cold I didn’t think there could be steam at all.

If someone other than you said that, I would think they were making a joke.

I now have that on my look up and study list.

@Dragonlance:

In real life there might well be occasions when it is ok to assume there is no effective difference between temperatures that are only half a degree apart.  However, there was no indication in civonamzuk's question that this was the case here. The fact that he quoted a temperature to 2 decimal places suggested that the decimal places were significant.  Taken with the fact that 0°C is 273.15K, then 233.16K is (very slightly) higher than the other two temperatures.  (273.16K is an important temperature in science - it is the temperature of the triple point of water - that is where water, steam and ice exist in equilibrium with each other).

I'm pleased to hear you want to do well in school.  I wish you all the best.

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25% of $28 is 1/4 of $28, which is $7

if this is his profit and he paid $28 for it, then he must have sold it for $28 + $7 = $35

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(Melody beat me to it)

Hi Eloise,

A shopkeeper buys an arcticle which costs him $28 and he sells it at a profit of 25%. How much does he sell it for?

There are 2 ways to do this.

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You can either find 25% of $28           that's   25/100*28

and then add it to the original $28

OR

You can recognise that $28 is 100%  You want to increase this by 25%  SO

You want   125%  of    $28                that is     125/100*28

Mr. Alan how are we supposed to know what is important?

If a question say to divide by pi how many decimal places should we use? If a science experiment say to measure the temperature how many decimal places should we use if it do not tell us?

If the question give two decimal places for F and C then I know it is important. Ok maybe a half degree is important because 1.0C =1.8F so maybe a tenth of a degree is important here even though it not have the decimal in the question part. But a hundredth of a degree? Where do we stop? When do we have enough. How do we know that is important?

Mr. Alan just in case I sound like it I am not trying to be a smart butt to you. I learn a lot of things from you every week.  I start real school with real teachers in two weeks. No more home school with moms and a dad who only know how to change diapers and tie shoes. I want to do good in school. 

I was just one second from posting this when Alan’s post pop up. So I think about it more before I post it.

I decided to post it because it not have to do with the question or answer but an attitude that seem strange to me. I make only one change in the parentheses part. Then I ask Alan questions in the next post.

You know Civonamzuk I not really care if you give me points or not. The points are not whats important on here. What is important is the knowledge and instruction on here. I finally learn enough to start answering questions after eight or nine months of learning. This place is a goldmine and I like to help and be a part of it.

You say DB can share his points. OK that is funny. He give me one and a mod give me three. I don’t which one. (Now I know it wasn’t Alan). And what is really interesting and funny is the same mod take 3 off you for being a smart butt. They hardly ever do that. Hahahaha

I guess because that make you mad you take 5 off mine and the check mark the mod give me and give yourself points on each of your posts. I don’t care about the points but I did like the check mark.

That is just petty. I thought you were in college or at least high school 12 grade. Maybe you are but part of you never grow up!

You have a picture of Tesla as your avatar. Tesla was a genius and some think he was crazy. Maybe he was but I bet he was not PETTY!

I assume the "8" in T8 and M8 means use 8 panels.  If so then:

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Careful with units Eloise.  cm*cm are cm² so your third line should be 12283 cm²

This is 1.2283 m²

I'll still give you points for trying though

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1.)   $${\mathtt{40}}{\mathtt{\,\times\,}}{\mathtt{135}}\% = {\mathtt{54}}$$

2.)  135 % = 135/100 = 1,35      =>    $${\mathtt{40}}{\mathtt{\,\times\,}}{\mathtt{1.35}} = {\mathtt{54}}$$

135% of 40

=135%*40

=54

Get this in the form (x - xc)² + (y - yc)² = r²

First look at the x-terms

x² + 3x can be written as (x + 3/2)² - 9/4  = (x - -3/2)² - 9/4  giving xc = -3/2

Now look at the y-terms

y² can be written as (y - 0)² giving yc = 0

(xc, yc) = (-3/2, 0)

So the original equation can be written as (x + 3/2)² - 9/4 + (y - 0)² - 17 = 0

or (x + 3/2)² + (y - 0)² = 17 +9/4

or (x + 3/2)² + (y - 0)² = 77/4

so r² = 77/4

r = (√77)/2

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(-1)116

=-116

173cm*71cm

=173*71

=12283cm

=122.83m

The equation will be in the form (x - xc)² + (y - yc)² = r² where (xc, yc) are the coordinates of the centre (in this case xc = -5 and yc = -10) and r is the radius, obtained here from r² = (-11 - -5)² + (-9 - -10)² or r² = 37, so:

(x + 5)² + (y + 10)² = 37

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What makes you think it isn't?!!!

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$$8\times(-\frac{1}{2})^2\rightarrow8\times \frac{1}{4}\rightarrow 2$$

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In general log_b(x) = n means that x = bⁿ, where b is the base.

In your case, if b = 10, then x = 10^-0.596 

$${\mathtt{x}} = {{\mathtt{10}}}^{\left(-{\mathtt{0.596}}\right)} \Rightarrow {\mathtt{x}} = {\mathtt{0.253\: \!512\: \!863\: \!049\: \!790\: \!8}}$$

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I don't agree with Dragonlance here; I agree with civonamzuk's original reply.  I see no reason (in science or mathematics) to assume that temperatures within half a degree of each other should be considered the same in general!

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If by "25 feet long" you are referring to the horizontal distance then the distance along the sloping surface can be found from Pythagoras:

$${\frac{{\sqrt{{{\mathtt{25}}}^{{\mathtt{2}}}{\mathtt{\,\small\textbf+\,}}{\left({\mathtt{25}}{\mathtt{\,\times\,}}{\mathtt{12}}\right)}^{{\mathtt{2}}}}}}{{\mathtt{12}}}} = {\mathtt{25.086\: \!655\: \!372\: \!483\: \!948\: \!9}}$$  feet

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