anonymous
  • anonymous
Find the length of the radius of a sphere with a surface area of 78.54 km2. A. 5 ft B. 15 ft C. 10 ft D. 2.5 ft
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
TuringTest
  • TuringTest
what google didn't work this time?
JamesJ
  • JamesJ
\[ Surface \ Area = 4 \pi r^2 \] where r is the radius. Use this formula to find the answer.
anonymous
  • anonymous
Google is not smart enough.

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More answers

TuringTest
  • TuringTest
\[A=4\pi r^2\]so\[r=\sqrt{\frac{A}{4\pi}}\]so plug in the value you are given for the area A, out will come r, your answer, as James will testify
anonymous
  • anonymous
k, thanks
TuringTest
  • TuringTest
what did you get?
anonymous
  • anonymous
well calculating things is actually hard; no ?
TuringTest
  • TuringTest
It would seem
anonymous
  • anonymous
wait, what the heck is the radius?
anonymous
  • anonymous
The answer.
anonymous
  • anonymous
yeah it's a heck! what the heck is that!!!
anonymous
  • anonymous
That is what needs to be figured out. So, call it r for now.
EarthCitizen
  • EarthCitizen
Just explain the damn thing!
anonymous
  • anonymous
oh wait, sorry. that was a dumb question. I was looking at it backwards
anonymous
  • anonymous
What's wrong with Google?
TuringTest
  • TuringTest
your mantra:\[A=4\pi r^2\]so\[r=\sqrt{\frac{A}{4\pi}}\]
anonymous
  • anonymous
EarthCitizen - Lot of people dedicate their time to help here. I don't think making demands on them and throwing arrogant insults is the best way to show respect and gratitude for their contributions.
anonymous
  • anonymous
lol Mantra.
EarthCitizen
  • EarthCitizen
whose arrongant and pompous by teasing ppl for the unfamiliarity with a topic! Focus!
TuringTest
  • TuringTest
where is saifoo? he is neglecting his modship
anonymous
  • anonymous
I don't remember anyone making fun of people for not knowing. Nobody even makes fun of not getting it. Yes, sometimes people do expect "learning" and insist on it.
anonymous
  • anonymous
wait, you guys.. im totally lost :-/ i need help.
anonymous
  • anonymous
pro-tempo-re mods can't be assigned much of tasks
TuringTest
  • TuringTest
Just for good measure\[A=4\pi r^2\]so\[r=\sqrt{\frac{A}{4\pi}}\]plug in the surface area (given in the problem) where the A in the formula goes. Out comes r, the answer.
EarthCitizen
  • EarthCitizen
then tech the best way YOU CAN!
anonymous
  • anonymous
On the contrary I find EarthCitizen a bit swanky.
EarthCitizen
  • EarthCitizen
teach
anonymous
  • anonymous
TuringTest: May be she needs helps in finding the square root too ?
anonymous
  • anonymous
Surface are of sphere = 4*pi*r^2 = 78.54km^2 So, r^2 = 78.54/(4*pi) So, r = SQRT(78.54/(4*pi)) So, r = ?
anonymous
  • anonymous
2.5?
TuringTest
  • TuringTest
Yes Yes Yes
EarthCitizen
  • EarthCitizen
yep
anonymous
  • anonymous
Yay! Good job.
anonymous
  • anonymous
Congratz.
anonymous
  • anonymous
oh thank god!
anonymous
  • anonymous
Magnum opus!
anonymous
  • anonymous
sorry you guys for being so cranky. along with math, I am also completing an essay. lots of work and multi tasking
anonymous
  • anonymous
Apology accepted.
anonymous
  • anonymous
We are thick skinned! Glad to see you do it.
bimbim2697
  • bimbim2697
GT CAN U HELP ME PLZ?
anonymous
  • anonymous
thankyou. still a lot more!! have the patience?
anonymous
  • anonymous
Well, I am also dark skinned on top!! hahahahaahaha.
anonymous
  • anonymous
lol! I ain't dark skinned like you GT :P
EarthCitizen
  • EarthCitizen
i see the light in U!
anonymous
  • anonymous
First of all question is somewhat wrong!!!!! Radius is a quantity representing length and radius doesn't need to be written as length of the radius. And coming to answer Surface area of sphere is 4*pi*r*r. From that r can be found out substituting others.

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