Meme2002 Meme2002

05-02-2015
Mathematics

Answered

Need help on question 12&13

Need help on question 12 amp;13 class=

Verified Answer :

konrad509 konrad509

05-02-2015

12.
\(\alpha=\dfrac{360}{n}\\ 18=\dfrac{360}{n}\\ n=20\)

13.
\(\dfrac{4}{10}=0.4\\\\ 1-0.1-0.4=\boxed{0.5}\)

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