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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
 2 years ago
 2 years ago
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
 2 years ago
 2 years ago

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TuringTestBest ResponseYou've already chosen the best response.0
what google didn't work this time?
 2 years ago

JamesJBest ResponseYou've already chosen the best response.1
\[ Surface \ Area = 4 \pi r^2 \] where r is the radius. Use this formula to find the answer.
 2 years ago

FoolForMathBest ResponseYou've already chosen the best response.1
Google is not smart enough.
 2 years ago

TuringTestBest ResponseYou've already chosen the best response.0
\[A=4\pi r^2\]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
 2 years ago

FoolForMathBest ResponseYou've already chosen the best response.1
well calculating things is actually hard; no ?
 2 years ago

hugsandkissesBest ResponseYou've already chosen the best response.1
wait, what the heck is the radius?
 2 years ago

FoolForMathBest ResponseYou've already chosen the best response.1
yeah it's a heck! what the heck is that!!!
 2 years ago

GTBest ResponseYou've already chosen the best response.4
That is what needs to be figured out. So, call it r for now.
 2 years ago

EarthCitizenBest ResponseYou've already chosen the best response.0
Just explain the damn thing!
 2 years ago

hugsandkissesBest ResponseYou've already chosen the best response.1
oh wait, sorry. that was a dumb question. I was looking at it backwards
 2 years ago

rainbow22Best ResponseYou've already chosen the best response.0
What's wrong with Google?
 2 years ago

TuringTestBest ResponseYou've already chosen the best response.0
your mantra:\[A=4\pi r^2\]so\[r=\sqrt{\frac{A}{4\pi}}\]
 2 years ago

GTBest ResponseYou've already chosen the best response.4
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.
 2 years ago

EarthCitizenBest ResponseYou've already chosen the best response.0
whose arrongant and pompous by teasing ppl for the unfamiliarity with a topic! Focus!
 2 years ago

TuringTestBest ResponseYou've already chosen the best response.0
where is saifoo? he is neglecting his modship
 2 years ago

GTBest ResponseYou've already chosen the best response.4
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.
 2 years ago

hugsandkissesBest ResponseYou've already chosen the best response.1
wait, you guys.. im totally lost :/ i need help.
 2 years ago

FoolForMathBest ResponseYou've already chosen the best response.1
protempore mods can't be assigned much of tasks
 2 years ago

TuringTestBest ResponseYou've already chosen the best response.0
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.
 2 years ago

EarthCitizenBest ResponseYou've already chosen the best response.0
then tech the best way YOU CAN!
 2 years ago

FoolForMathBest ResponseYou've already chosen the best response.1
On the contrary I find EarthCitizen a bit swanky.
 2 years ago

FoolForMathBest ResponseYou've already chosen the best response.1
TuringTest: May be she needs helps in finding the square root too ?
 2 years ago

GTBest ResponseYou've already chosen the best response.4
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 = ?
 2 years ago

hugsandkissesBest ResponseYou've already chosen the best response.1
sorry you guys for being so cranky. along with math, I am also completing an essay. lots of work and multi tasking
 2 years ago

GTBest ResponseYou've already chosen the best response.4
We are thick skinned! Glad to see you do it.
 2 years ago

bimbim2697Best ResponseYou've already chosen the best response.0
GT CAN U HELP ME PLZ?
 2 years ago

hugsandkissesBest ResponseYou've already chosen the best response.1
thankyou. still a lot more!! have the patience?
 2 years ago

GTBest ResponseYou've already chosen the best response.4
Well, I am also dark skinned on top!! hahahahaahaha.
 2 years ago

FoolForMathBest ResponseYou've already chosen the best response.1
lol! I ain't dark skinned like you GT :P
 2 years ago

EarthCitizenBest ResponseYou've already chosen the best response.0
i see the light in U!
 2 years ago

AtchyutBest ResponseYou've already chosen the best response.0
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.
 2 years ago
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