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 3 years ago
A solid candy jawbreaker is cut in half. If its diameter is 4 cm, what is the surface area of a half piece? please show me the steps.
 3 years ago
A solid candy jawbreaker is cut in half. If its diameter is 4 cm, what is the surface area of a half piece? please show me the steps.

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sammy12
 3 years ago
Best ResponseYou've already chosen the best response.0i am getting 8 pi .is it right

Tonik
 3 years ago
Best ResponseYou've already chosen the best response.1i think it should be 48pi

Tonik
 3 years ago
Best ResponseYou've already chosen the best response.1oh hell, no.... i thought radius was 4, not diameter... sec

sammy12
 3 years ago
Best ResponseYou've already chosen the best response.0answer is 12 pi.I don't know how

funinabox
 3 years ago
Best ResponseYou've already chosen the best response.12A = 4pi*r^2 2A = 4pi*(2)^2 2A = 16pi A = 8pi I set it equal to 2A because we want half the surface area, I found the full SA then divided by 2.

Tonik
 3 years ago
Best ResponseYou've already chosen the best response.1the surface area on the outside is 8pi, you're correct, but you need to add the surface are where the cut was made (basically the area of a circle radius 4

funinabox
 3 years ago
Best ResponseYou've already chosen the best response.1Ahhh yes I forgot about the inside cut. I assumed a hollow sphere. :O stupid mee

Xishem
 3 years ago
Best ResponseYou've already chosen the best response.0It's the surface area of half a sphere plus the surface area of the circle... \[\frac{4πr^2}{2}+\pi r^2=2 \pi r^2+\pi r ^2=3 \pi r^2= 3 \pi (2cm)^2=12 \pi\ cm\]
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