What is the area of a regular decagon (10 sides) with a side length of 14.5 cm and apothem of 22.3 cm? Round the answer to the nearest tenth. a. 1,616.8 cm^2
b. 1,701.0 cm^2
c. 2,102.5 cm^2
D. 3,235.4 cm^2

Im not looking for just an answer if someone could explain how to work out this problem I will mark brainliest, thank you so much!!

C

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!

.95

step-by-step explanation: