mattheman1812 mattheman1812
  • 17-02-2017
  • Mathematics
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Help please. Do NOT answer if you don't know it. Thank you.

Help please Do NOT answer if you dont know it Thank you class=
Help please Do NOT answer if you dont know it Thank you class=
Help please Do NOT answer if you dont know it Thank you class=
Help please Do NOT answer if you dont know it Thank you class=
Help please Do NOT answer if you dont know it Thank you class=

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apologiabiology
apologiabiology apologiabiology
  • 17-02-2017
a=pir^2

1.first one is 3.14 times 3.5*3.5=38.46 or about 38.5
2nd option


2.
c=2pir
c=2*3.5*3.14=21.98=22.0
4th opttion

3.
d/2=r
12/2=6
a=pir^2
a=3.14*6^2=113.04, or about 113.0
 1st opiton


4.
8*5+1/2*3.14*4^2=65.12=65.1, so
3rd  option


5.
2*2=4
4^2-3.14*2^2=3.44 or abot 3.4
3rd option
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