Question

WILL GIVE METAL!!!!
A cylinder has a radius of 5x+2 and a height of 2x+8. Which polynomial in standard form best describes the total volume of the cylinder? Use the formula V=TT r^2h for the volume of a cylinder.
*100TTx^4+880TTx^3+2256TTx+256TT
*50TTx^3+240TTx^2+168TTx+32TT
*20TTx^3+168TTx^2+384TTx+128TT
*10TT^2+44TTx+16TT
TT=pie sign

Answer 1

@zepdrix
HELP PLEASE.

Answer 2

@Nnesha
PLEASE HELP.

Answer 3

@kropot72
HELP?

Answer 4

first replace r by 5x+2

Answer 5

=4

Answer 6

\[\huge\rm V =(5x +2)^2 (2x +8) \pi\]
do

Answer 7

wait i have to login to another lattop

Answer 8

0?

Answer 9

0 what ??

Answer 10

I put in the equation into my calculator and it said 0?

Answer 11

which calculator ??

Answer 12

a graphing calculator

Answer 13

okay but you have to foil it
(5x + 2) ^2
which is same as (5x+2) times (5x+2)

Answer 14

100.53

Answer 15

if you look at ur answer choices there are VARIABLES
"X" this is not "multiplication" sign it is x
so how did you get 100.53 ???
answer suppose to be with variable x

Answer 16

I typed
(5x+2)(5x+2)(2x+8)TT
into the calculator

Answer 17

ti84 calculator ?

Answer 18

idk one that my school told me to download
Wabbitemu is what it is called

Answer 19

okay give me a sec to look at that

Answer 20

does it have yellow button ??

Answer 21

its Texas Instruments TI-83 Plus Silver Edition

Answer 22

ohh yeah so that's not gonna work for variables :(

Answer 23

do you know foil method ??

Answer 24

kind of.

Answer 25

okay lets do it together (5x+2)(5x+2)
do it first and let me know what you get

Answer 26

foil (5x+2)(5x+2)

Answer 27

25x+20x+4?

Answer 28

yep right but 5x times 5x = ??

Answer 29

when you multiply variables you should add their exponent :)

Answer 30

25x^2

Answer 31

yep right now \[\huge\rm (25x^2 + 20x + 4)(2x+8)\]
again foil method

Answer 32

do I multiply 25x^2 times
20x+4
or
2x+8?

Answer 33

nope you have to multiply 2x and 8 with everything in this parentheses ( 25x^2 +20x+4)

Answer 34

\[\huge\rm 2x(25x^2 + 20x + 4) \]
\[\huge\rm 8(25x^2 + 20x + 4) \]

Answer 35

I know this is probably wrong be I tried
50x^2+40x+8x
200x^2+160x+32

Answer 36

@Nnesha

Answer 37

again 2x times 25x^2 = ??

Answer 38

\[\huge\rm x^n \times x^m = x^{n+m}\]

Answer 39

I honestly don't know..i have been working on this problem for over an hour and I'm completely done. thank you for all you time and help but I will ask for help on Monday.

Answer 40

well almost done
i'm trying to say that when you multiply variables you should add their exponent
so 2x^1 times 25x^2 = 50x^{1+2} = ?

Answer 41

ok then what?

Answer 42

after that just multiply everything by pi

Answer 43

3.14?
@Nnesha

Answer 44

nope just pi not pi value

Answer 45

\(\color{blue}{\text{Originally Posted by}}\) @L<3VE
I know this is probably wrong be I tried
50x^2+40x+8x
200x^2+160x+32
\(\color{blue}{\text{End of Quote}}\)
please correct his mistake
2x times 25x^2 = ??
2x times 20x = ??

Answer 46

this**

Answer 47

so the answer is a?

Answer 48

well 2x times 25x^2 = ??
this is suppose to be first term

Answer 49

50^2 which is B

Answer 50

x^1 times x^2 = ??? :(

Answer 51

Sorry 50TTx^3

Answer 52

\(\huge\color{green}{{\rm yes}!}\)
and yes b

Answer 53

Thank you...

Answer 54

np :)