Question

helllllllpppppp!!!!!!!!!!
a cylinder has a radius of 2x+3 and height of 6x+. which polynomial in standard form best describe the total volume of the cylinder?

Answer 1

V=pi*r^2*h

V=pi*(2x+3)^2*6x

Answer 2

do you know the formula for the volume of a cylinder ?

Answer 3

vol of cylinder =2*pi*r*l
=2*3.14*(2x+3)*6x
=37.68x(2x+3)
=

Answer 4

That is not the correct formula @wwe123

Answer 5

yea i know the formula i just dont know how to use it

Answer 6

@phi

Answer 7

baba ji ka thullu

Answer 8

baba ji ka thullu @Samuraisam

Answer 9

**yea i know the formula i just dont know how to use it ***

First write it down. can you do that ?

Answer 10

done

Answer 11

can you post it ?

Answer 12

V=pi*r^2*h

Answer 13

a cylinder has a radius of 2x+3

that means replace r in your formula with (2x+3)

height of 6x+ <-- did you leave something out ?
whatever the height is, replace h in your formula with the expression

can you do that ?

Answer 14

yes ok i got it thanks btw how to i give medals out i wanna give you one

Answer 15

they want the answer in standard form, which means you have to multiply out that mess

Answer 16

ok well i got 24pix^3+76pix^2+66pix+9pi
is that right

Answer 17

what is the height ... 6x+ ? or just 6x

Answer 18

6x+1

Answer 19

\[ V = \pi r^2 h \\
V = \pi (2x+3)^2 (6x+1) \\
V = \pi (4x^2 +12x+9)(6x+1)
\]
now we do
\[ V= \pi \left( (4x^2 +12x+9) 6x + (4x^2 +12x+9)\cdot 1\right) \\
V= \pi \left(24x^3 +72x^2 +54x + 4x^2 +12x +9 \right)
\]
that simplifies to
\[ V= 24\pi x^3 + 76 \pi x^2 + 66 \pi x + 9 \pi \]
which matches what you got.

Answer 20

yay (claps whaaooo) thxz

Answer 21

yes, that was a bit painful

Answer 22

i understand lol i have a test full

Answer 23

@phi