All Answers 359255 Answers

x = 677/ 45^3  = 0.0074293552812071

It's not clear to me what you are asking. 

y is used as part of the calculation of r using Pythagoras's theorem.

dy is used to indicate a small (infinitesimal) region of the linear charge distribution.

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1. Yes, you are correct.

2. When log₅x = 0 then log₂₅y = 2

This means that when x = 5⁰ then y = 25²  or when x = 1 then y =625

If, in general, y = k*xⁿ then we must have 625 = k*1ⁿ or just k = 625

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The surface area of the cylinder is just  (assuming that pi = 3)

(area of top and bottom) + (area of the side)

(2 x pi x r^2)   + ( 2 x pi x r x h) =

(2 x 3 x 25) + (2 x 3 x 5 x 9) = 420 cm^3

Now...I assume you want to find the edge of a cube that would give you the same surface area....

So we have......

S_a = 6s^2       where s is a side (edge) length of the cube

420 = 6s^2

s^2 = √(420/6)= √70  = about 8.37 cm.

Matt spends 30 x 42 = 1260 p

Bob buys 50 x 22  =    1100 p

You should be able to do it from here....

Just take the square root of 24 = √24 = √(4 * 6) = √4 x √6 = 2√6

Just divide 2000 by 5

x + 9 = 3/2     multiply everything by 2 to clear the fraction

2x + 18  = 3   subtract 1 from both sides

2x = -15        divide both sides by 2

x = -15/2

Hit the "2nd" button on the calculator......you will see the "atan" function  (the tangent inverse)

The radius is given by

√(2*95/ pi)  = r

We can take as many non-zero derivatives as the highest power of the polynomial dictates.

For example....

y = x^2

y' = 2x

y'' = 2

And the third derivative would be  0.

It's a matter of definition.

Do you think that zero is infinitely many times differentiable ?

Well, you can relate the two. I'm learning about Probability too at school.

45^3 * X =677

$${\mathtt{x}} = {\frac{{\mathtt{677}}}{{{\mathtt{45}}}^{{\mathtt{3}}}}}$$

x=677/91125

Answer is 70%. You can easily find it.

 $$\left({\frac{{\mathtt{56}}}{{\mathtt{80}}}}\right){\mathtt{\,\times\,}}{\mathtt{100}} = {\mathtt{70}}$$

29:1600=6:?

$${\frac{{\mathtt{6}}{\mathtt{\,\times\,}}{\mathtt{1\,600}}}{{\mathtt{29}}}} = {\frac{{\mathtt{9\,600}}}{{\mathtt{29}}}} = {\mathtt{331.034\: \!482\: \!758\: \!620\: \!689\: \!7}}$$

331.034 km

The drum needs to hold   (50 x 231) in^3  = 11550 in^3   ....and the radius = 2.5/2 ft = 1.25 ft = 15 in

So we have

11550  = pi * (15)^2 * h     

11550 = 225 pi * h        divide both sides by 225 pi

11550 / (225 pi) = h = about 16.34 in

Thanks Jillybean :))

How wonderful that baballama is cured and how convenient that you are both at the hospital together.

CONGRATULATIONS ON CHA CHA'S ARRIVAL.

I'm a Nana once again - I am sooooooooooo chuffed :)))

Here is a gift for Cha Cha.

OH!   I like ChaCha 

Here some Chocs just for you CPhill     :)

 How could a girl resist loving such a nice guy as you ?

From your secret admirer. 

And here is a poppy just for you as well  

Thanks For posting these Melody!

    For me the easest way to find this angle (or either angle of a right triangle) is using square root. In this case 23 squared minus 13 squared = 360. Now find the square root of 360. = 18.97366596 this is the length of side oposite. Now divide 18.97366596 by 23 =.824941998 = the sine of the angle you are looking for. inverse .824941998 = 55.58261129 = the decimal degrees of the angle looking for. Inverse 55.58261129 =55. degree 34 minutes 57.4 seconds. I may not know very much about formules, but I put this to practical use for over 41 years as a Tool & Die Maker (aska machinest) without any problem. If you use a little common sence and not clutter your mind trying to remember to many ways to work a simple right angle (nothing wrong knowing other ways),  Just remember Square and Square root, Tangent and Sine, keep it simple. If you get these down pat you can keep up with the best.   Please dont come down to hard on me for not knowing all the fancy ways, just keeping it simple.  This is Rustynut "just getting by" 

that just made my day!thanks melody!

Let's see if we can "un-stump" you

(4+√3)/(5-√6)     multiply the denominator and the numerator bty the conjugate of the

denominator, i.e., 5 + √6....so we have

(4+√3)/(5-√6)  * (5 + √6) / (5 + √6) =

(20 + 5√3 - 4√6 -√18) /( 25 - 6) =

(20 + 5√3 - 4√6 - √(9*2) ) / 19 =

(20 + 5√3 - 4√6 - 3√2 ) / 19

And that's it.......mutiplying by the conjugate just gets the root out of the denominator....

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Maybe there isn't any meaning.....maybe we're just forms of protoplasm that are here for a short time....and then.......we're gone......

Even so.....I still like getting chocolates for Valentines Day.....