Question

Solve for R, please help!
3000 = 2(pi)r50 + (pi)r^2

Answer 1

\[3000=100 \pi r+\pi r^2,Right ?\]

Answer 2

right!

Answer 3

\[\pi r^2+100 \pi r -3000=0\]

Where,

\[a=\pi\]

\[b=100 \pi \]

c=-3000

in Quad formula.

Answer 4

This is just and end to a question I was solving, and now I need to find the radius which is r. I plugged in the numbers and solved the other stuff.

Answer 5

\[r=\frac{ -b \pm \sqrt{b^2-4ac} }{ 2a }\]

Answer 6

I know you can do the rest :)


Best of luck and Happy new year buddy :)

Answer 7

\[r=\frac{ -100\pi \pm \sqrt{100\pi^2-4(-3000\pi)} }{ 2\pi }\]

Is that how I should present my answer exactly? By the way, thank you so much, you've already done so much :)

Answer 8

\[r=\frac{ -100\pi \pm \sqrt{(100\pi)^2-4(-3000\pi)} }{ 2\pi }\]

Now solve further :)

Answer 9

r=8.78 cm ?

Answer 10

wait which pi 3.14 or \[\frac{ 22 }{ 7 }\]

Answer 11

do u already have the answer right

Answer 12

@karmel its worth noting 22/7 is 3.14 lol

Answer 13

yea but sometimes it makes a difference whether u put the fraction or the decimal

Answer 14

if u carry it out further cause the decimal form is 3.141592653589793238462643383279502884197169399375105820974944592307816406286208998348253421170679 where as 22/7 is 3.142

Answer 15

but they dont give u all of that listen i have my own thing to do and i cant argue right now i have a 90 page packet and i am not even half way done so ok bye bye

Answer 16

wasnt arguing just joking and alright have fun lmao

Answer 17

wow really

Answer 18

?

Answer 19

nuthin goodbye

Answer 20

@Karmel

Well you should refer to this if you want to learn about pi


http://openstudy.com/users/hba#/updates/50e027c8e4b050087cd0c732

Answer 21

well i am over this spo no need

Answer 22

but thank you for your concern

Answer 23

Then you would be saying that the value of pi is 355/113,Which infact is the best approximation :)

22/7 is also a good approximation though :)

Answer 24

ok

Answer 25

You're welcome :)