ElectricPavlov

4700 = 4000 ( 1 + .0725/2)²ⁿ      solve for 'n'  years....

And flip horizontally for   f (-x)

Domain is the values of 'x' the graph has      -3<=x<=4

   range is the y values the graph covers      -3<=y<= 2

-f(x)    will be flipped to look like this:

tan 63  =  height / 27         solve for height in feet

So is your 'mastery' of the English language !  D'oh !

y = k x^1/4  

3 sqrt 2 = k (81)^1/4

   ^{k = sqrt 2}

y = sqrt 2 ( 4)^1/4  =   sqrt 2 (2²)^1/4  = sqrt 2   ( 2^1/2 ) =   sqrt2  sqrt 2  = 2

But remember....when f(0)    x = 0    so you get    a(0)^2 + 0 * x  + c       and this equals 'c'

                                                                                   AND you are told  f(0) = 0                        NOW what can you say about 'c' ?

arctan (142/246) =  29.995 ~~ 30 degrees

Start with not using   478

   then you have  2 x 2 x 2 x 2 x 2 = 32   combos

then you can have  ONE  8      or  ONE 7     or  ONE  4      each in one of the 5 positions = 15     the other 4 positions 2 x 2 x 2 x 2   possible

                                 15  x 16 = 240

then you can have TWO of the 4 7 8       47    74    78   87   48   84             5 C 2   x 6 = 60

     the other three positions  would be   2 x 2 x 2 = 8 

           60 x 8 = 480 

you can have all of 4 7 8    in 6 orders   x   5 C3 = 60    the other two positions filled by 2 x 2

                                       4 x 60 = 240

Summing the reds =      992  possible numbers         ( same answer guest found !)

Here is a better place to start:

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