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by **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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by **stapel_eliz** on Wed Mar 10, 2010 10:01 pm

What formula did they give you?

:wink:

by **kyl367** on Wed Mar 10, 2010 10:33 pm

4 (pi/3.14) r^2

by **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 $\pi$ ), 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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is this answer correct for TOTAL surface area of sphere?

is this answer correct for TOTAL surface area of sphere?

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

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