Question

The radius of a clindrical gift box is (2x +3) inches. The height of the gift box is twice the radius. What is the surface area of the cylinder? Answer as polynomial in standard form.

Answer 1

surface area of cylinder = ? @yourmomneedsanswers !

Answer 2

https://www.google.co.in/#q=surface%20area%20of%20cylinder

Answer 3

2πrh+2πr2, right?

Answer 4

ya !

Answer 5

so what do i do with that

Answer 6

r= (2x+3)
h=2(2x+3)

Answer 7

h=2r ; given in the question !

Answer 8

2pir(r+h)=2*pi*(2x+3)(2x+3+2(2x+3))

Answer 9

sa = 2*pi*(2x+3)(2x+3+4x+6)=2*pi*(2x+3)(6x+9)

Answer 10

do FOIL method and simplify !

Answer 11

do u know FOIL method ?

Answer 12

yes

Answer 13

but i mess up on it a lot

Answer 14

ok.

Answer 15

try it .

Answer 16

i'll help u !

Answer 17

ok

Answer 18

this is so confusing

Answer 19

try !

Answer 20

(2x+3)(6x+9) = 2x(6x+9)+3(6x+9)

Answer 21

=12x^2+18x+18x+27

Answer 22

final answer =2*pi*(12x^2+36x+27)

Answer 23

is that clear for you ? @yourmomneedsanswers

Answer 24

that doesnt sound like the surface area, or maybe im not understanding?

Answer 25

it says it isn't right

Answer 26

24*pi*x^2+72*pi*x+54pi

Answer 27

6*pi(4x^2+12x+9)

Answer 28

that wasnt right

Answer 29

then do u have the answer ?

Answer 30

no.