As an artist, Ernest is doing a solo show titled CUBES. One of his pieces is shown below. Each layer of the piece is a cube. The bottom cube has a side
length of 3 m, the middle cube has a side length of 2 m, and the top cube has a
side length of 1 m. The top two layers are each centred on the layer below.
Ernest wishes to paint the piece. Since the piece will be suspended in the air, the
bottom will also be painted. Determine the total surface area of the piece,
including the bottom.

step-by-step explanation:

hello from mrbilldoesmath!

answer:

25x^2 + 90x + 84

discussion:

mn(x) = m(n(x)) = m( 5x + 9) =

(5x + 9)^2 + 3 =>

25x^2 + 90x + 9^2 + 3 =

25x^2 + 90x + 84                 (as 9^2 = 9*9 = 81)

which is the second choice

regards,  

mrb

p.s.   i'll be on vacation from friday, dec 22 to jan 2, 2019. have a great new year!

step-by-step explanation:

sorry i just needed points for a quiz plz for give me

the answer is b.

64

step-by-step explanation:

c=2πr=2·π·8≈64