Question

Is some willing to help me with a few questions? please tell me before I post them

Answer 1

what's the formula for volume of a cone ?

Answer 2

V=πr2h/3

Answer 3

that's correct
use the given information
volume is 108pi
so replace` v` with 108pi
the height `h` is 4 replace h with 4

Answer 4

108=πr24/3

Answer 5

don't forget the pi \[\large\rm 108 \pi = \frac{4}{3}\pi r^2\]
solve for r

Answer 6

1.3?

Answer 7

how did you get that ?

Answer 8

4/3?

Answer 9

\[\large\rm 108 \pi = \frac{4}{3}\pi r^2\]
what would be the first step to get rid of everytying except r^2 from right side ?

Answer 10

Idk but I think that it's 34.7

Answer 11

how would you cancel out 4/3 from right side ??

Answer 12

do the same thing to the other side? I don't know tbh

Answer 13

welll
4/3 times pi times r^2 so you should do opposite of multiplication to cancel out 4/3 and pi from right side
for example \[v=7 \cdot x\]
7 times x i will divide both sides by 7 to solve for x

Answer 14

oh okay

Answer 15

I did it and got the first answer !

Answer 16

show me your work.

Answer 17

\[\large\rm 108 \pi = \frac{4}{3}\pi r^2\]
4 is dividing by 3 to cancel out 3 from right side `multiply 3` both sides

Answer 18

108*3?

Answer 19

yes \[\large\rm 108 \pi = \frac{4}{\cancel{3}}\pi r^2 \cdot \cancel{3}\]
\[3 \cdot 108 \pi = 4 \pi r^2\]

Answer 20

multiply 108 pi by 3

Answer 21

324

Answer 22

don't forget!! the pi
pi is a constant and its value is 3.14
so 324 isn't same as 324pi or (324 times 3.14)

Answer 23

\[ 324\pi = 4 \pi r^2\]
now how would you cancel out `4pi` from right side ?

Answer 24

multiply?

Answer 25

@dmezzullo

Answer 26

multiply what ?

Answer 27

each side

Answer 28

well 4pi is already being multiplied by r^2
if you multiply both sides by 4pi
you will get 16
you should do `opposite ` of multiplication

Answer 29

divide

Answer 30

right.

Answer 31

i sort of give up on this question i think i'm going to do another one :) but thank you

Answer 32

only two step left..
you need r^2 by itself on the right side
lets say r^2 is allergic to 4pi
that's why 4pi is being divided by itself on both sides

Answer 33

oh okay