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Are you Romanian?

I do not understand what the '&' symbol means. 

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Nu înţeleg ce înseamnă simbolul "&".

Okay! This one looks really... long... Nevertheless! Lets solve it!

Alright, lets start with setting out the equation.

$$\left({\frac{\left(-{\mathtt{4}}\right)}{{{\mathtt{7}}}^{{\mathtt{2}}}}}\right){\mathtt{\,-\,}}{\frac{{\frac{{\frac{{\frac{{\mathtt{\,-\,}}\left({\frac{{\mathtt{2}}}{{{\mathtt{5}}}^{{\mathtt{3}}}}}\right)}{{\mathtt{\,-\,}}{\mathtt{sqr64}}}}}{{\mathtt{625}}}}}{{{\mathtt{\,-\,}}\left({\frac{{\mathtt{8}}}{{\mathtt{125}}}}\right)}^{{\mathtt{1}}}}}}{{\mathtt{3}}}}$$

I am not quite sure what you were asking... This is what I got out of your question. Perhaps this is correct?

Anyway, Indeed this is a very confusing equation

First of all, we will need to work out

$${\mathtt{\,-\,}}\left({\frac{{\mathtt{4}}}{{{\mathtt{7}}}^{{\mathtt{2}}}}}\right)$$

This will equal to -0.0816326530612245.

Then we move on. We will substitute along and make this question easier.

$${\mathtt{\,-\,}}{\frac{{\mathtt{0.081\: \!632\: \!653\: \!061\: \!224\: \!5}}}{{{\mathtt{5}}}^{{\mathtt{3}}}}} = {\mathtt{\,-\,}}{\frac{{\mathtt{4}}}{{\mathtt{6\,125}}}} = -{\mathtt{0.000\: \!653\: \!061\: \!224\: \!489\: \!8}}$$

Then we subsititute what we get as the numerator again.

$${\mathtt{\,-\,}}{\frac{{\mathtt{0.000\: \!653\: \!061\: \!224\: \!489\: \!8}}}{{\sqrt{{\frac{{\mathtt{64}}}{{\mathtt{625}}}}}}}} = {\mathtt{\,-\,}}{\frac{{\mathtt{1}}}{{\mathtt{490}}}} = -{\mathtt{0.002\: \!040\: \!816\: \!326\: \!530\: \!6}}$$

Once again we substitute!

$${\mathtt{\,-\,}}{\frac{{\frac{{\mathtt{0.002\: \!040\: \!816\: \!326\: \!530\: \!6}}}{{{\mathtt{\,-\,}}\left({\frac{{\mathtt{8}}}{{\mathtt{125}}}}\right)}^{{\mathtt{1}}}}}}{{\mathtt{3}}}} = {\frac{{\mathtt{25}}}{{\mathtt{2\,352}}}} = {\mathtt{0.010\: \!629\: \!251\: \!700\: \!680\: \!2}}$$

Here we are!

The Answer!

Negative 4 over seven squared minus negative 2 over five cubed over the square root of negative 64 over 625 divided by the cubed root of negative 8 over 125 equals to 0.0106292517006802!

Is this Romanian?

3.33 in order of 642,348 Radical

I do not know what this means.

Can you take a picture of what you mean and upload it using the tiny pic tool?

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3.33 în ordinea 642,348 Radical

Nu ştiu ce înseamnă asta.

Poti lua o imagine a ceea ce înseamnă şi încărcaţi-l utilizând instrumentul de tiny pic?

Whatever you believe life means, is what it means. Everyone's 'Life' travels in different directions. Only you have the ability to determine what life means.

This is not a square. A square is a 2 dimension shape where all the sides are the same and it has no depth!

Do you mean a rectangular prism? What are the units?

7 waht?  163250 what?

It is the same as mine and Chris's as well!!

My view is:

Probability that 4 non-skiers died (hence 3 skiers survived) is:

$${\frac{{\mathtt{14}}{\mathtt{\,\times\,}}{\mathtt{13}}{\mathtt{\,\times\,}}{\mathtt{12}}{\mathtt{\,\times\,}}{\mathtt{11}}}{\left({\mathtt{17}}{\mathtt{\,\times\,}}{\mathtt{16}}{\mathtt{\,\times\,}}{\mathtt{15}}{\mathtt{\,\times\,}}{\mathtt{14}}\right)}} = {\frac{{\mathtt{143}}}{{\mathtt{340}}}} = {\mathtt{0.420\: \!588\: \!235\: \!294\: \!117\: \!6}}$$

 Oops! Just noticed that this is the same as Bertie's reply (though Bertie did a more complete job by including an explanation).

There is no base given so I think it is okay to assume that it is base 10

If you want an estimate just put it straight into the calculator.

(I'm going to use the Math(input-output) button.)

$${log}_{10}\left({\frac{{\mathtt{9}}}{{\mathtt{80}}}}\right) = -{\mathtt{0.948\: \!847\: \!477\: \!552\: \!618\: \!7}}$$

@@ End of Day Wrap - Thursday 22/5/14   Sydney, Australia   Time 18:50

Good evening/day everyone,

Another busy day, especially for me and (CPhill) Chris but lots of other people produced good answers as well.  Theses answerers are Heureka, Reinout-g, Zegroes, Bertie, GoldenLeaf, Kitty<3, Alan, Isiber17, Takahiromaeda and rosala.  Thank you everyone.

Some people also showed their appreciation.  Thank you we really appreciate that.  We like getting thumbs up too!   But, if you are not completely satisfied with your answer make sure you say so!  You can also join in and ask questions about someone elses question if you want.

I would like to take this opportunity to commend Kitty<3 for her consistantly high quality answers.  Kitty is one of our younger answerers and she is a great role model for all the others.

Now for some posts that you may find interesting 

Heureka explained a bit more LaTex.  I have been using it today and it works a treat!  Thanks Heureka.

Good one Alan!

Thanks Heureka,

I didn't know there was a MOD button on this calculator either!

Melody.

You could just put it in as 

tan(64+6/60)=

$$\underset{\,\,\,\,^{\textcolor[rgb]{0.66,0.66,0.66}{360^\circ}}}{{tan}}{\left({\mathtt{64}}{\mathtt{\,\small\textbf+\,}}{\frac{{\mathtt{6}}}{{\mathtt{60}}}}\right)} = {\mathtt{2.059\: \!418\: \!717\: \!851}}$$

Hi Rosala,

Welcome to Web2.0calc forum!

I have just sent you a private message!

Melody.

pH is -log to base 10 of H⁺ concentration, so:

a. $${\mathtt{pH}} = {\mathtt{\,-\,}}{log}_{10}\left({\mathtt{7.9}}{\mathtt{\,\times\,}}{{\mathtt{10}}}^{-{\mathtt{9}}}\right) \Rightarrow {\mathtt{pH}} = {\mathtt{8.102\: \!372\: \!908\: \!709\: \!558}}$$  

or pH≈8.1

b. $${\mathtt{conc}} = {{\mathtt{10}}}^{-{\mathtt{3.2}}} \Rightarrow {\mathtt{conc}} = {\mathtt{0.000\: \!630\: \!957\: \!344\: \!480\: \!2}}$$

conc of H⁺ ≈ 6.3*10^-4

This just means add up the individual terms (and divide the result by n).  For example 

$$If the $X$'s were $X_1,X_2,X_3$ then $\sum_{k=1}^3X_k = X_1+X_2+X_3$\\\\
Sometimes you might have a function to sum, rather than a set of data; and sometimes that summation might simplify. For example\\
$$\sum_{k=1}^nk^2=\frac{n(n+1)(2n+1)}{6}$$

 I should perhaps expand that last one a little:

$$$$\sum_{k=1}^nk^2=1^2+2^2+3^2+...+n^2=\frac{n(n+1)(2n+1)}{6}$$

It occurs to me that if Jack has three children aged 1, 5 and 91 he is a remarkable person!  I'll have what he's having!!

Let n be the number of 10 paisa coins and m the number of 50 paisa coins.

We are told 

n + m = 70    ...(1)

10*n + 50*m = 19*100   ...(2) (if, that is, the r stands for rupees and there are 100 paisa in 1 rupee).

Rearrange equation (1) to get 

n = 70 - m  ...(3)

Substitute this into equation (2):

10*(70 - m) + 50*m = 19*100

Multiply out the bracketed term

700 - 10*m +50*m = 19*100

Collect the m's

700 +40*m = 19*100

Subtract 700 from both sides

40*m = 1200

Divide both sides by 40

m = 30 

Substitute this back into equation (3)

n  = 70 - 30

n = 40

u have 60 apples which are multiplied by 7 so u get ,

ATQ ; 60 * 7= 420

u get 420 apples !

This says that

e^2 = x + 4      so.......

(e^2 - 4) = x

I don't even know if the newer calculators still have this button, or not.....

OK...you asked for it!!!

43 - 21  = 22

Let's hold those cheers to a minimum, folks!!

I've only seen that as EXP

Since you know what it is are you going to answer the question?

Sorry, I see that you have.

What a show off !!

$$\text{do } 2^{nd}\text{ - Button and use mod}$$

Thanks for catching that....sorry about dropping out that divsion sign!!

Mea culpa!!