All Answers 358524 Answers

Use the calc on the home page :)

2.25 cups in 8 hours.  That is 

$${\frac{{\mathtt{2.25}}}{{\mathtt{8}}}} = {\frac{{\mathtt{9}}}{{\mathtt{32}}}} = {\mathtt{0.281\: \!25}}$$ 

cups per hour 

2hours  2*0.28125 cups

4hours   4*0.28125 cups

6 hours  6*0.28125 cups

you get the idea   

Just use brackets like this

(sin(63))^-1

There is a calc on the home page. 

All calculators have their pluses and minuses but this calculatior does have a lot of very nice features :)

f^-1(x)  =  (3 = x)/2  

geno means (of course)

$$f^{-1}(x) = \frac{ 3 - x}{2 }$$

Mathematician,

It is not a good idea to give negative points when people seriously try to help you.

If you know that the answer is incorrect of if you want to ask questions about their answer then add another post to explain what you are thinking.

We like people to be interactive with answering.  

Good answer Mathematician but you have not rounded it to the nearest hundredth!

You have rounded it to 3 significant figures  

$$\\cos^6x=cos^4x\\
$Divide both sides by $\;cos^4x\\
cos^2x=1\\
cosx=\pm1
$At this point I just think about the unit circle$\\
$cos of an angle is given by the x value (not the angle x)$\\
$The x value is 1 at 0 and it is -1 at 180 degrees$\\
So \\
x=180n$ degrees where $ n\in Z\\
or\\
x=n\pi$ radians where $ n\in Z\\$$

That is a very good answer Mathematician :)

Hi Mathematician,

I am really confused by your notation.  I am sure I could work it out if I wanted to badly enough, it seems that Geno has done so, but instead I would like to help you to learn how to present your question properly.  

Method 1:  You can use the "Math Formula" button above.  Open that up and type

sqrt(25)+(sqrt(16)+9)     I am guessing but maybe this is what you want.  

I shall do it and show you what you should get.

$${\sqrt{{\mathtt{25}}}}{\mathtt{\,\small\textbf+\,}}\left({\sqrt{{\mathtt{16}}}}{\mathtt{\,\small\textbf+\,}}{\mathtt{9}}\right)$$       There you go - is that what you wanted?

Method 2:  Open up  LaTex by pressing the LaTex Formula button above. and type

\sqrt{25}+(\sqrt{16}+9)

I shall show you the output

$$\sqrt{25}+(\sqrt{16}+9)$$

------------------------------------------------------------------

Method 1 is the easiest to learn but it would be good if you start learning LaTex because it is much more versatile.

The answer as Gino has shown you is  5+(4+9)=5+13=18

$${\sqrt{{\mathtt{74}}}}$$

No square numbers go into 74 so sqrt(74) cannot be simplified.

It is an irrational number so It cannot be written  precisely as a fraction or as a decimal.

You can estimate it using a calculator.

You can use the site calc on the home page.  Just type in

sqrt(74) and hit the = sign.

Multiply by enough 10's to turn the decimal into an integer and then divide by that many 10's, then simplify if necessary.

For example to turn 0.514 into a fraction multiply by 1000 to get 514 then divide by 1000 to get 514/1000 =2*257/(2*500) = 257/500.

If it's a repeating decimal you need to do it differently.  Look at 0.3333...... for example:

Let f = 0.333333..... 

10f = 3.33333......

Subtract f from 10f to get 9f = 3  

Divide both sides by 9 to get f = 3/9

Simplify: f = 1/3

.

Total number of names in the lottery = 100*3 + 150*2 + 200 = 800

Number of seniors names = 100*3 = 300

probability of choosing a senior = the fraction of senior names = 300/800 = 3/8 = 0.375

Go to where it says Scientific in the input box.  Click on this and select Fractions.

.

This is the cumulative distribution function for the normal (or Gaussian) distribution.  It looks like the following for a distribution with mean 0 and standard deviation of 1.

.

or this...

3.141592653589793238462643383279502884197169399375105820974944592.

BEAT IT!

Why do you want a hash button?

If you need a calculator to solve that problem, please use the one at this site.

I'm assuming that the problem is 3^(x + 2) =7

Since 3^(x+ 2)  =  3^x · 3^2

Then, 3^(x + 4)  =  3^x · 3^4  which is (3^x · 3^2) · 3^2,

Thus, 3^(x + 4)  is 9 times bigger than 3^(x+ 2)  and 9 x 7  =  63

Whenever you want to replace the ⊗ operation with its answer.

If you have the symbol x in any expression, you replace the x symbol with its answer. For instance, when the expression is 4 + 6 x 5, you simplify it by replaceing 6 x 5 with 30, giving you 4 + 30, which is 34.

So, if you have the expression 4 + (49 ⊗ 2 ), you calculate 49 ⊗ 7 to be √49 + 2 = 7 + 2 = 9.

Then, you have 4 + 9  =  13.

I see what you're saying...but how do I know when to transfer √(A)+B to 25 Ⓧ (16 Ⓧ 9)?

Is it when I see the Ⓧ, because Ⓧ means + and the operation before + in the equation is √?

If the rule is :  √(A) + B   (with only A under the square root sign):

Work from the inside out:    16⊗9  becomes  √(16) + 9  =  4 + 9  =  13

Then, you have  25⊗13  =  √(25) + 13  =  5 + 13  =  18

Isn't the answer 0 jars?

Because it says "to fill new jars (of the same size and shape) completely" and no jars can be filled completely with 6/9 worth of pickles?