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Pi is the ratio of the circumstance to the diameter of any given circle.

It is approximately

3.14159

But since it is an irrational number it cannot be express exactly in digits.

First: work out the difference (decrease) between the two numbers you are comparing.

Decrease = Original Number - New Number

Then: divide the decrease by the original number and multiply the answer by 100.

% Decrease = Decrease ÷ Original Number × 100

If your answer is a negative number then this is a percentage increase.

Source:

"Percentage Change | Increase and Decrease." Percentage Change. Skills You Need, n.d. Web. 08 May 2016.

Arc sine is the same as inverse sine.

Use.    2nd   then    asin

18/1=18÷1=18

We want to catch any two of the six catfish = C(6,2) and any three of the six bluegill = C(6,3)

And total possible ways to catch any five of the twelve fish = C(12,5)

So.....the probability of exactly two catfish is given by :

                                                                            __

C(6,2) * C(6,3)  / C(12,5)   = 25/66  = about  0.378   = about 37.8%

4(5-1)^2-2(2)^2

There's nothing to "solve"........just to evaluate

4(4)^2 - 2(2)^2  =

4(16) - 2(4)  =

64  - 8  =

56

Some people tip on the TOTAL amount...which includes TAX...others tip only on the amount of the purchase:

6.5 (1.0925)(1.15)=

8.17   if you tip with the tax included o/w  8.08

my^2+2y-4=0

-4(y^-2)+2(y^-1)+m=0

4(y^-2)-2(y^-1)-m=0

4(y^-2)-2(y^-1)=m

(2(y^-1)-0.5)=4(y^-2)-2(y^-1)-m

(2(y^-1)-0.5)=0

m=-0.25

y=4

That's what you meant by one root, right?

= (9*3) x^(8+5) = 27 x^(13)

x= 15  195

Your question header and the actual question have TWO different numbers

.00213 = 2.13 x10^-3

.0213  = 2.13 x 10^-2

x=3

2.23 *10^-3

Touch the '2nd' key in the upper left...    the sin button will then be 'asin'    which is short for arcsin....or sin^-1    

Seven divided by twenty five = 0.28

K > 4/3  yields only solutions with imaginary numbers (involving ' i ')....is that what you meant?

my^2 +2y - 4 = 0

Use quadratic formula to find    the only way for one root is sqrt( 4+16m)  = 0     so m = -1/4

   Leaving the only y= 4        root

This is an equation for  a LINE....any point on the line will be a soluton to this equation.

5x + 2y = 12y +8x + 8y

-18y = 3x

y = -3/18x  = -1/6x          y= -1/6 x         is a LINE in the form of   y =  mx + b     where m = slope and b = y intercept (0 in this case)

That's FANTASTIC!!!!

3.14