ElectricPavlov

You will have to have the height of the helicopter to solve this....but you didnt supply that info in your post ! 

   if your answer 5880 m is correct, then the helicopter is approx 5897 m high ?   Yes?

Circle-insribed angles intercept an arc which is twice as big as the angle    so QRS = 57*2 = 114

    then arc SPQ = 360 - 114 = 246 degrees     this arc is intercepted by angle QRS and is TWICE the angle QRS

        and then angle QRS =   1/2  * 246 = 123 degrees

1:24    means there is   1 out of (1+24 =25)    or  1/25 saline in the first dilution

then mix this 1/25     in a ratio of 1:3     meaning   1/4    of     1/25   is now saline =  1/100 is saline

1/100th of 200 =  1/100   * 200 = 2 ml saline in 200 ml of the twice diluted mix .

The braces are the hypotenuse of a right triangle with legs of 40 and 55 in

brace² = 40²  + 55²

brace =~~ 68 in

Use distance formula twice to find side lengths

WX = sqrt (6^2 +2^2 ) = sqrt 40

WZ = sqrt ( 9^2 +3^2) = sqrt 90

Area = sqrt(40*90) = 60 units²

^{To find the diagonal use distance formula from W to Y}

^{or    sqrt (   sqrt(40)^2 + (sqrt(90)^2 ) =sqrt 130}

At first glance, it appears that none of the letters are the same ....so zero chance

there are a total of   13 + 12 + 5 = 30 marbles

   5 are blue       5 out of 30 =    5/30 = 1/6                as WDPD found !

center the vertex at 0, 0

vertex form becomes

y = a ( x-0)^2  + 0

y = a x^2     now sub in the points given

7 = a (28)^2                   ( 28 is 1/2 of the 56 dimension)

7/784 = a

y = 7/784 x^2

Here is the graph:    (just the graph between the blue dots)

https://www.desmos.com/calculator/iq30nygvng

Grains = 2^s-1      where s is the square number 

   so on day 1      2^1-1 = 2⁰  = 1 grain

on the 64^th  square    2⁶³ = 9.22 x 10¹⁸ grains

Value:       

1.1 million =     1.1 x 10⁶

     9.22x10¹⁸ / 1.1x106    *   4.4     =   a lot of dollars        is that price   4.40 dollars / bushel?

                                                    = 3689348815 x 10⁴   dollars

D_t   = D_o 2^(t)

100 D_o =  D_o 2^t

100 = 2^t

2= t log 2

t = 6.64 years