is this answer correct for TOTAL surface area of sphere?  TOPIC_SOLVED

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is this answer correct for TOTAL surface area of sphere?

Postby kyl367 on Wed Mar 10, 2010 9:24 pm

d= 30 m

SURFACE AREA=
4 X 3.14(R^2)
4 X 3.14(15^2)
4 X 3.14(225)=
My answer is 2826
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Postby stapel_eliz on Wed Mar 10, 2010 10:01 pm

What formula did they give you?

:wink:
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Re: is this answer correct for TOTAL surface area of sphere?

Postby kyl367 on Wed Mar 10, 2010 10:33 pm

4 (pi/3.14) r^2
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Re: is this answer correct for TOTAL surface area of sphere?  TOPIC_SOLVED

Postby stapel_eliz on Wed Mar 10, 2010 11:24 pm

That's the right formula. I don't know if you're supposed to round (using "3.14" instead of ), or if you're supposed to round so heavily. If "d" stands for "diameter", then your steps (other than the heavy rounding and truncation) look okay.

Note: Since "d" had units on it, then you'll need units on the answer. :wink:
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