ElectricPavlov

SIlly question.....here is a silly answer:

(6.2 % + 1.45%) x 670 = $ 51.26 for this pay period

arc tan(-1) = x/2

-45 (~315) or 135 = x/2

x = 270  degrees    630 degrees

Just depends on how many digits you want to go:

Atomic weight of

N=14.0067

H= 1.00794     x 3 = 3.02382         NH3 = 17.03052  gm /mole

1.2 x 10^3/17.03052   =   70.46173575 moles

The original weight had only TWO significant digits, so I used 2 significant digits in the atomic weights....LOL

Atomic weight of

N=14

H= 1    x 3 = 3         NH3 = 17 gm /mole

1.2 x 10^3/17 = 70.59 moles

= 4 2/3   = 14/3

x^2+x-12 / x-3 =15

=  (x-3)(x+4) / (x-3) = 15

= x+4 = 15

x = 11 

20 gallons of 80% =   20 (.8) = 16 gal of pure ethanol needed

x = amount of 90% needed

20 gal - x  = amount of 65% needed

x(.9) + (20-x)(.65) = 16                      

.9x + 13 - .65x = 16

.25x = 3

x= 12 gallons of 90% needed   so  20-12 = 8 gallons of 65% needed

12-8 = = 4 gallons MORE of the 90% than the 65% needed 

Just use the calculator   enter your number then hit =

653.0000001 = 6.530000001e2

Unclear

14 x 10^6 = 14, 000, 000

(14 x 10)^6   = 140^6  = 7529536000000