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Thanks Guest, 

Firstly this is not an AP

3*1^2+4*2^2+5*3^2+...............+(n+2)*n^2 is a A.P series. Find the sumtotal.

I put this into Wolfram|alpha and got this result.

(20/100)*Full = 800

Full = 800*100/20   so  Full = 4000 litres

.

Perhaps you mean: "How many times does the reciprocal of 5 go into 5" ?

Tal vez decir: "¿Cuántas veces el inverso de 5 entra en 5"?

\(5 \div \frac{1}{5}=5 \times \frac{5}{1}=25\)

\(180°=\pi\) radians

I know that becase \(1°=\frac{\pi}{180°}\) and if you multiply \(\frac{pi}{180°}\) by \(180°\) you get \(\frac{180°\pi}{180°}\) and if you reduce you get \(\pi.\)

You use your mouse to click the numbers and then either add, subtract, divide, multiply, square, or put an exponent on them. This is a process called 'Math' in America, where you place numbers together and figure out an answer to them. If you don't have a mouse, use your mousepad or keyboard to figure it out. ~(o-o)~ Sadly, if you still don't understand, I have no other way of explaining a calculator to you.

Translator won't work. Anyone know how to speak Spanish?

There are plenty of ways to find the height of an isosceles triangle. It all depends on the imformation you have been given about the triangle in the question.

You can use basic trigonometry -> SOHCAHTOA

You can also use sin or cos rules -> C² = A² + B² - 2ABcos(angle)

What makes isosceles special is the fact that two of its angle are the same so if you know just one of the angles in triangle you can work out the other two angles. (bear in mind that the total internal angle of a triangle is 180 degrees).

hope it explains your question.

A=1/4√(5(5+2√5))a^2 if a is a side

PI  r^2 = area     area of each slice is proprtional @  15degrees/360degrees

pi r^2  x  15/360 = 13.089 ~ 13 sq in

This series begins as follows: 0, 3, 16, 45, 96, 175, 288, 441, 640, 891.......etc.

Its sum can be obtained thus:Sum_(n=1)^10(n^3-n^2-n+1) = 2595......for the first 10 terms.......etc.

0/0  has no definite value.

It is an "indeterminate expression"  --  that is, it can become any value, depending upon how this expression came into being. When you take calculus, this will become clearer.

If you start with the general quadratic function:  ax² + bx + c  =  0

and apply the procedure of completing the square to this function,

you can get the solution of:  x  =  [ -b +/- sqrt( b² - 4ac ) ] / ( 2a )

A number so big it sounds like 4951760157141521099596496896000

12.5*360

_______

    100

= 12.5*36

   _______

     10

= 450/10

=45

-3*2.718282+1

=-8.154846+1

=-9.154846

24+4<f

=28<f

=f>28

Assuming digits, prob. of digit is 1/10

Assuming letters, prob of letter is 1/52

Assuming lowercase or uppercase, prob of letter is 1/26

For example, the password is 3fds66

You know it has only lowercase letters.

You know the amount of letters and numbers.

P(guessing the password)= 1/10*1/26*1/26*1/26*1/10*1/10=1/1757600

idk

43,257.41=6,000[1+R/4]^(20*4) divide both sides by 6000.

7.2095683=[1 + r]^80 take the log of both sides.

Log(1+r)=10^0.010723865

1+r=1.025

r=1.025 - 1

r=.025 x 100

r=2.50%

Real numbers are numbers that can be found on the number line. This includes both the rational and irrational numbers: Example: ALL these are "Real numbers" :1,    12.38,    −0.8625,    3/4,    √2,    198,.........etc.

 I think you don't know that it is a formula of A.P