Question

the volume of a sphere is 3,500pie m^3. what is the surface area of the sphere to the nearest square meter

Answer 1

ughh too lazy lol ima go eat breakfast, but this is how u'd do it:
V = (4/3) pi r^3 = 3500pi

Answer 2

(4/3)r^3 = 3500, solve for r
then find the surface area by pluggin r into the following:
A = 4pi r^2

Answer 3

lol ur too lazy or me? lol i like bein lazy but i jus dnt get volume

Answer 4

ok thnx

Answer 5

just solve for r and then put that into the surface area..

Answer 6

how do you plug in for surface area???

Answer 7

surface area = 4 pi r^2

Answer 8

LOL, u tryin to slow him down:-)

Answer 9

ok i got 835.561??????

Answer 10

this website seems slow this morning
what did you get for r?

Answer 11

umm idk

Answer 12

r^3 = 3500 / (4pi/3)

Answer 13

couldnt i jus cube root it enstead of tht confusing division
an get 15.18

Answer 14

= 835.561
r = cube root of this

Answer 15

so 9.4

Answer 16

= 9.419 - to get a more accurate result

Answer 17

noe plug this into the formula for surface area

4 pi r^2

Answer 18

Surface area is 3*vol/r

Answer 19

1114.858

Answer 20

???

Answer 21

yep

Answer 22

but thats not one of my answer choices

Answer 23

another way is to use the formula estudier posted -
plug in volume and radius

Answer 24

what are your answer choices

Answer 25

a) 2391 m^2
b)43982 m^2
c) 173 m^2
d) 1196 m^2

Answer 26

ok i'll recheck the calculations

Answer 27

oh ok - i used 3500 for the volume - it is 3500 pi - sorry

Answer 28

so??? wats tha answer?

Answer 29

so we have 4/3 r^3 = 3500
r = 13.795

Answer 30

oh snap its A

Answer 31

using the formula are = 3 * vol / r
area = 3 * 3500pi / 13.795 = 2391 to nearest meter

Answer 32

yep

Answer 33

ok how you get surface area from volume???

Answer 34

V=4 pi r^3 /3
SA = 4 pi r^2
-> SA = 3*V/r (divide on by other).

Answer 35

ok thnx imma try an get it myself

Answer 36

yw

Answer 37

ok one more ? how you get r from volume?

Answer 38

rearrange the formula for voluime making r the subject

V = (4/3) pi r^3
divide both sides by (4/3) pi


r^3 = V / (4/3) pi
r = cube root [ V / (4/3) pi]

Answer 39

In this case you didn't have to worry about the pi because the question put the volume as a multiple of pi, so it cancels.

Answer 40

ok imma post the ? that im workin on hold on