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Oh. Very sorry. I'm only a 6th grader. I sometimes make Calculation Errors/Properties.

Sin(2/5)=.4

Asin(.4)=23.58 degrees

-153

x(4x)^2=x(16x^2)=16x^3

There are 57 trailing zeros in 238!.

Plan B costs 68/mo      Plan C costs 92/mo     or   24/ mo more...   If she saves 45 minutes and thinks it is worth it, then her 45minutes is = to 24 dollars       45mins=24    then One Hour =  24/(45/60) = $32/hr  is what she thiks her time is worth.

asin(inverse sin) will give you angle A:

asin(4/5) = 53.130102354156

A=53.130102354156

Given the informtion in the question we can set up the equation of this circle as:

(x-5)^2 + (y+1)^2 = 25         substituting the points shows A. (2,3) is a solution

if a £1 note equals $2 in america what would £893295.865 be in america?

What do you find so difficult about your question?

1 pound =2 dollars

2 pounds = 4 dollars

3 pounds = 6 dollars

What did we just do above? We multiplied  pounds by 2 in each example! So, you will do the same no matter the number of pounds:

£893,295.865 x 2 =$1,786,591.73 US dollars.

We can use the equation of  a circle to solve this :

(m -  2)^2  + ( -3 + 3)^2  =  7^2        simplify

(m - 2) + 0   = 49

(m - 2)^2   =  49       take both roots

m - 2 =    ±7        add 2 to both sides

m = ±7 + 2    =   7 + 2 = 9      or   -7 + 2  = -5

So.....A  is correct

LOL.    

This IS a calculator site !!!

There aren't 'square feet'  (an AREA) in 'Cubic Feet'  (a VOLUME)  ...they are two different things.

When you multiply  AREA times HEIGHT you get VOLUME.

Given this volume of 333513.4    the AREA (i.e. footprint) of the volume can be just about ANY value which you can only calculate if you know the third dimension (height)

sqrt (32)   =

sqrt (16 * 2)  =

sqrt(16) * sqrt (2)  =

4 * sqrt (2)  ≈  5.657

sqrt(32) = 5.6568542494923802

While 120 degrees IS equal to 2/3 pi, that isn't what the question asked.  

The answer is 240 degrees.   Cos 120=Cos240=-0.5

V_cylinder  =  π * radius^2 * height    =

   18π    =     π ^ ( 3)^2 * height

    18π   = 9 π  *  height       [   divide both sides by 9π   ]

     2   =   height

10 times 7/8 minus 3 2 times 7/8 plus 4

10 * (7/8) -  32(7/8)  + 4   =

(10/8)*7 - (32/8)*7  + 4  =

7 * ( 10/8 - 32/8) + 4  =

7 * ( -22/8) + 4  =

7 * (-11/4)  + 4  =

-77/4 + 16/4  =

-61/4  =  -(15 + 1/4)

"2nd button"

 atan(0.57735026918962570 = 30 (deg)

30 DEG or PI/6 

It is a graphing calculator, which is fairly easy to use. Like all these things it has good and bad features! 

Yes this is the right one Melody. It is free.

Cos -120 and cos 120 both have the same value.

cos is negative in the 2nd and 3rd quadrants.

-120 degrees is the same as 240 degrees,