Top surface of a raised platform is in the shape of regular octagon as shown in the figure. Find the area of octagonal surface.

use formula for the circle a=3.14

step-by-step explanation:

12.5 feet

step-by-step explanation:

it would take 7/10 of an hour too fill the pool.

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!