ElectricPavlov

1

For every THREE moles of Hydrogen , TWO moles of ammonia are produced.

How many moles of Hydrogen are there?

PV=nRT  

  P ressure  V olume  n umber of moles   R=gas constant 0.082057 L atm mol-1K-1     T emp in K

12(15)= n (.082057)(300)        n = 7.312 moles

7.312/3  * 2 = 4.875 moles of ammonia produced

For every 142 people, 12 are going to A

How many 142's  are there in  1704?     1704/142 = 12 sets

   so 12sets  x 12 people/set = 144 people       going to see A

X = .273 273 273......

1000x = 273.273 273...

1000x - x = 999x

999x = 273

x = 273/999 = 91/333

OK...I figured this out a few minutes ago ignore MOST of my previous gyrations.... I see someone has posted the answer below....BUT here is the SAME equal series payment formula that applies as I used before...   What you need to think of this as:   you are paying off the 12250 @ 5% in 36 months AND you have to continue paying the 5% interest on the OTHER 12250 per month as you go.....so

A = P (1+i)^n [ i/((1+i)^n  -1)]           n = 3 x12 = 36    i = 5%/12 = .0041667

A = P ( .029970897)

A =12250(.016104933) = $367.14349  

   PLUS the monthly interest on the OTHER 12250     

12250 (.05/12) = $ 51.0416

= 418.185 =~ 418.19   per month   for an increase in your monthly payment of

      418.19 - 318.20 = 99.99      essentially   100 more a month !    Ta Da!

Thanx Guest  for your agreement!      Whew!  Glad I finally figured out the errors of my ways.....

Type 5 x 10^300   =   = 

From the graph you can see that it is a (4 x 3) rectangle with two (right) triangles attached  (base 4   h  2)    

You have been shown how to do several of these similar graphs.....try to figure out an answer and get back to me if you have questions......

The triangles will be RIGHT triangles with leg lengths of 8 and 12

Pythagorean theorem will give the length of the hypotenuse (which is the diagonal cut)

sqrt (8^2 + 12^2) = 14.42 in

The perimeter of ONE of these triangles is the sum of the sides    12 + 8 + 14.42 = 34.42 inches

1

     2 (x^2-2x) -6   complete the square

Y=  2 (x-1)^2 - 8

2

  x intercept(s) happen when y = 0   set the equation to y=0

  0 = 2(x-1)^2 - 8

4 = (x-1)^2

+- 2 = x-1

x = 3, -1

3

  From 2 above    (-inf,-1) U (3, +inf)

Range = all values of x are allowed in the domain...the range extends from the vertex at -8 to + inf     [-8, +inf)

This is an upright parabola....the funtion is decreasing from -inf to the vertex (1,-8)    or for values of x  ( -inf ,1]

Yes on a,b,c if you are going to use the quadratic formula....or you may be ble to 'see' that it factors in to:

(x+5)(x+4) = 0     then x = -5 or -4