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February 28, 2015

February 28, 2015

Posted by **xleogirlx** on Sunday, November 3, 2013 at 10:59pm.

A. 49.86 in2

B. 153.86 in2

C. 196.86 in2

D. 616.86 in2

B

- Math Can someone check my answers ? -
**DrBob222**, Sunday, November 3, 2013 at 11:05pmB looks ok to me but that looks like too many significant figures for the data you posted.

- Math Can someone check my answers ? -
**xleogirlx**, Sunday, November 3, 2013 at 11:07pmthats what my teacher gave me so it right ?

- Math Can someone check my answers ? -
**Jai**, Sunday, November 3, 2013 at 11:09pmAre you sure it's "surface area" and it's "circle"? Because usually if the shape is 2D, the term is 'area' only.

If it's "area of a circle" only,

A,circle = pi*r^2

A,circle = 153.9 in^2 (closest to letter B)

If it's "surface area of a sphere",

SA,sphere = 4*pi*r^2

SA,sphere = 615.8 in^2 (closest to D)

hope this helps :3

- Math Can someone check my answers ? -
**xleogirlx**, Sunday, November 3, 2013 at 11:14pmyes i double checked with my teacher n the question is right

- Math Can someone check my answers ? -
**DrBob222**, Sunday, November 3, 2013 at 11:55pmJai is right. Surface area confused me too but I assumed area since a one dimensional circle must be area.

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