ElectricPavlov

Total circumference =  pi d = 16 pi

 this is a fraction of total    40/360  * 16pi =    16/9 pi =~ 5.59  METERS    ( you only get 1/2 credit if you leave units off!)

10 x 6 +        4 (1/2 * 2 *5 ) = 80 units²

You'll have to find the depth of the object

frot face area = 7 x 8.2    - 4.2 x 2 = 49 m²  

49 m^2 * depth = 490 m³          10. m = depth

NOW,  surface area = 49 *2    + 7*10    + 4*10     + 2*10   + 4.2 *10   +  5*10  +    8.2 * 10  = .......... m²

Long division

                  x^2 -6x +8

x+5 | x^3 -x^2 + kx + 40

        x^3 + 5x^2

              - 6x^2  + kx + 40

               -6x^2 -30x

                          (k+30)x + 40       k+ 30 must = 8 for this to have no remainder    so k = -22

                               8x     +40

(x+5)(x^2 -6x+8)

(x+5)(x-4)(x-2)   is factored

.10 x    = amount of gloss in  10%

   .35 (6-x)   = amount of gloss in 35%

.10x    + .35 (6-x)        =    .30(6)       solve for 'x' the gals of 10% then   35% = 6-x

What do YOU think the answers are ?

7/4  pi   is almost a full circle (2 pi)     this angle is in   Q IV

- pi/4   would be coterminal

reference   pi/4

tan = sin / cos     sin is negative in Q IV      sin = - sqrt 2/ 2   cos = sqrt 2 /2       take it from here....

25 % discount means you pay 75 % of original

x (.75)                  now take a 10 % discount  ...you pay 90%

x (.75)(.90)          now take 5% off ...you pay 95%

x(.75)(.90)(.95)    now ADD 8% tax

x (.75)(.90)(.95)(1.08)      =  $1385.10 

x =  $ 2000  original price

angle = 1/2 ( AB- DC)

78= 1/2 ( 108-DC)

DC = 48^o

38 = 1/2 (y-x)

76 = y-x        and       y and x sum to 360    so   x = 142    y = 218