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Dana plans to cover this model of a half moon completely with silver foil.
How many square centimeters of silver foil would Dana need to cover the model completely?
402.2
536.2
603.4
150.8
 one year ago
 one year ago
Dana plans to cover this model of a half moon completely with silver foil. How many square centimeters of silver foil would Dana need to cover the model completely? 402.2 536.2 603.4 150.8
 one year ago
 one year ago

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trackzzBest ResponseYou've already chosen the best response.0
Dude, this is a homework help site, do not ask for emails :P
 one year ago

crystal1Best ResponseYou've already chosen the best response.0
its not and ur a player
 one year ago

campbell_stBest ResponseYou've already chosen the best response.2
well the surface area of a hemisphere is \[SA = \frac{1}{2}(4pir^2) + \pi r^2\] and you have a radius of 8 cm just substitute and solve.
 one year ago

crystal1Best ResponseYou've already chosen the best response.0
i dont know how to do that
 one year ago

crystal1Best ResponseYou've already chosen the best response.0
cause i just see leters
 one year ago

campbell_stBest ResponseYou've already chosen the best response.2
ok... do you have a calculator ?
 one year ago

campbell_stBest ResponseYou've already chosen the best response.2
ok you need to type in \[0.5 \times 4 \times \pi \times 8^2 + \pi \times 8^2\] that will give the answer to covering the hemisphere in foil..
 one year ago

trackzzBest ResponseYou've already chosen the best response.0
Alrii so basically what campbell has show you is the surface are of a sphere. Any problem in which they ask for something that wraps around a specific shape involves surface are. The surface area of a sphere is: 4 pi r^2 Where r is the radius of the sphere.
 one year ago

crystal1Best ResponseYou've already chosen the best response.0
what is p 12.18 or 12.14
 one year ago

trackzzBest ResponseYou've already chosen the best response.0
If you're familiar with the button pi, it is the value of 3.14. Now for this particular question, it is a hemisphere. So half the surface are of the sphere. 1/2*(4pi r^2) = SA
 one year ago

trackzzBest ResponseYou've already chosen the best response.0
@crystal1 what are you talking about>
 one year ago

trackzzBest ResponseYou've already chosen the best response.0
you said:" what is p 12.18 or 12.14" what do you mean?
 one year ago

trackzzBest ResponseYou've already chosen the best response.0
so you got the answer?
 one year ago

crystal1Best ResponseYou've already chosen the best response.0
my answer is 5048.1152
 one year ago

campbell_stBest ResponseYou've already chosen the best response.2
nope... thats a long way from being correct
 one year ago

campbell_stBest ResponseYou've already chosen the best response.2
did you type in the equation I gave you as its written...?
 one year ago

trackzzBest ResponseYou've already chosen the best response.0
Shall we break it down Campbell? I think it's the BEDMAS
 one year ago

trackzzBest ResponseYou've already chosen the best response.0
Alright crystal, I want you to do r^2 first. Find the value of the radius squared.
 one year ago

crystal1Best ResponseYou've already chosen the best response.0
yes i did @campbell_st
 one year ago

campbell_stBest ResponseYou've already chosen the best response.2
and tracks... I think you possible solution is missing the circular base... as the question talks about competely covering... it
 one year ago

crystal1Best ResponseYou've already chosen the best response.0
you guys lost me now im confuse
 one year ago

campbell_stBest ResponseYou've already chosen the best response.2
ok... lets to it in little bits can you calculate \[0.5 \times 4 \times \pi \times 8^2\]
 one year ago

trackzzBest ResponseYou've already chosen the best response.0
Ok my bad, alrii yeah you're right. I'll leave this to Campbell. Dont wanna confuse you,
 one year ago

campbell_stBest ResponseYou've already chosen the best response.2
@crystal1 did you get an answer for the new calculation..?
 one year ago

campbell_stBest ResponseYou've already chosen the best response.2
what was the number..?
 one year ago

crystal1Best ResponseYou've already chosen the best response.0
i dont reaally know im sorry im dumb i dont know how to start this thats why i need help
 one year ago

trackzzBest ResponseYou've already chosen the best response.0
You're not dumb. Tell yourself you're smart. You'll get the answer. Crystal, you got this. Wake up, look at what campbell wrote for you.
 one year ago

trackzzBest ResponseYou've already chosen the best response.0
you're not finished yet. Add the pi r^2 to what you got to get the answer
 one year ago

campbell_stBest ResponseYou've already chosen the best response.2
nope thats only the 1st part of the problem the curved surface has an area of 402.2 cm^2 now you need to find the area of the circular base... \[\pi \times 8^2\]
 one year ago

campbell_stBest ResponseYou've already chosen the best response.2
you need to calculate this number...
 one year ago

campbell_stBest ResponseYou've already chosen the best response.2
then the final answer will be \[402.2 + \pi \times 8^2 = \]
 one year ago

campbell_stBest ResponseYou've already chosen the best response.2
wow... nope not it lets make it easier what is \[\pi \times 8^2 =\]
 one year ago

campbell_stBest ResponseYou've already chosen the best response.2
nope still not right... \[\pi \times 8^2 = 201.1\]
 one year ago

crystal1Best ResponseYou've already chosen the best response.0
how do you get thaat i tough that 8x2 its = 24
 one year ago

campbell_stBest ResponseYou've already chosen the best response.2
do you know how to square a number...
 one year ago

campbell_stBest ResponseYou've already chosen the best response.2
ok... then perhaps you need to ask you teacher... how to do the problem is you don't know the basics...
 one year ago

crystal1Best ResponseYou've already chosen the best response.0
thnks you @campbell_st
 one year ago
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