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We have :

[3.09 x 10^(-9)] / [.-02 x 10^(-9)]

Notice that the 10^(-9) terms "cancel" and we're left with

3.09/.02     

If we multiplied the top and bottom by 100, the decimal points in the numerator and denominator would move to the right by 2 places, and we get

309/2

And there you go.....

No religious material/questions is to be posted on this site.  Thank you.

Well he's not online if that's what you're thinking XD

Just enter this into the on-site calculator and hit " = "

@@ End of Day Wrap - Friday 20/6/14   Sydney, Australia   Time 1:10am  (Saturday morning really)

Great answers were provided to day by CPhill, Rosala, Alan, Zegroes, Reinout-g, Rom, Kitty<3, jboy314, MacGamer04 and NinjaDevo.

jboy314 only just became a member in the last day or so.  CPhill and I are both really impressed with the answers that you have already given.  Keep up the good work.

Welcome to web2.0calc forum jboy314. We hope you continue to write great answers.  We also hope that you have fun and learn lots.  

As many of you know, NinjaDevo has made an improved version of our Sticky Thread "Information Pages worth Keeping or Developing"  The presentation looks fabulous.  Ninja says he has included (almost) all the information that was in the old one.  I have been intending to check it out properly but I can see the only way that is going to happen is if I put it up properly for people to use.  Ninja has included the address of the old version on the first page so if anything is missing it can still be easily found.  I used the old version of this thread quite heavily.  I don't know if other people did or not.  I really encourage you to see what is there and to make full use of it.  If you want to add  your own information/comment page that is encouraged (you only need one, you can edit it if you want to add things) Please respect the fact that it is a serious thread and treat it with respect.   Thank you very much Ninja for doing this for us!  

I nearly forgot to include the posts!

Lunch box unwrap - Examples of memes.  (Thanks reinour-g)

Thanks for those resources, Melody.......I find that people who don't know the "times table" to some reasonable extent - whatever one defines that as - have trouble reducing fractions, simplifying radicals......etc.

I just did something like it......look under "Answers"

8x is 160% more than 1289+2.22x

This implies that

8x = (1289 + 2.22x)(1.6)   simplifying, we have

8x = 2062.4 + 3.552x     subtract 3.552x from both sides

8x - 3.552x = 2062.4

4.448x = 2062.4     divide both sides by 4.448

x= 2062.4 / 4.448 = 463.6690647482014388  or about 463.67

Let me point out that the website makes a slight error.....well, not THAT slight...!!

It claims that 2^63 = 18,446,744,070,000,000,000

Actually, it's only 9,223,372,036,854,775,808....but, like I always say, what's a few quintillion (U.S.) amongst friends??

The Earth to AC and back again applies to ALL the rice grains on the chess board laid end to end......

The sum of this is:

Thus we have

(.2in x 1ft/12in x 1mile/5280ft) x 18,446,744,073,709,551,615  =     58,228,358,819,161 miles

I find it much easier to learn memory facts if they are presented as repetitive games on the computer so I am going to see what multiplication games/sites I can find.

This one looks pretty good - Itis broken up into all different sections so you can choose what you want to practice.

$${{\mathtt{2}}}^{{\mathtt{63}}} = {\mathtt{9\,223\,372\,036\,854\,775\,808}}$$ GRAINS.  

(And that is just on the last square - it is NOT the total of all the rice grains)

THAT IS A LOT OF RICE!!!

A grain of rice is approximately .2 inches long. Converting .2 inches to feet (divide by 12 inches to a foot) and then dividing that number by 5,280 feet in one mile, we get the length of the grains of rice, placed end-to-end, to be approximately 60,000,000,000,000 miles. How far is that? Alpha Centauri, the nearest star, is located 25,000,000,000,000 miles from Earth. Placed end to end, these grains of rice would reach farther than from the Earth, across space to the nearest star, Alpha Centauri, and back to Earth again!

Yes, it was a strange interpretation - I'll give you that!

Well yeah,

I found it pretty ironic to see that he interprets the problem

a 300000 35-year mortgage with 6% interest computed monthly

as the problem

300000*35

It's like wolframalpha is 4 years old. 

found him!

(This one is cutesy of Reinout-g)

\begin{array}{|l|l|}32\% & 100\%\\0.32 & 1.00\\43.7 & 136.5625\\\end{array}   

$$\begin{array}{|l|l|}32\% & 100\%\\0.32 & 1.00\\43.7 & 136.5625\\\end{array}$$

Heureka, your method is definitely interesting......whether it's "easy" could be up for debate ...!!!

But......as I always say, if it works for you....go for it !!!!

Thanks reinout. Is that wolfram|Alpha output suposed to show something?

Speaking of dragon where is he....

The quadratic formula, that CPhill used is definitely the way to go.  Why make it hardeer than necessary.

(The other answers are good value too)

This will help you remember it.

I want a cookie :)

And now that I'm thinking about it, does anyone know how much 1+1 is?

I've also been wondering where the percentage button is

Yep, that makes sense

$$\begin{array}{|l|l|}
32\% & 100\%\\
0.32 & 1.00\\
43.7 & 136.5625\\

\end{array}$$

p.s. that's just me testing this new LaTex function

If it says BETWEEN -4 and 8 then -4 and 8 should DEFINITELY NOT be included.