P(heads or tails) = 1 This is because when flipping a coin, there are only two possible answers, either heads ir tails so the probability of getting either one is 100%. However, if you're asking for P(heads) = 1/2, and P(tails)= 1/2.
Area of circle= π·r² so, π·20²= π·400≡ 1256.637061
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i don't see the question, but i can help you
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153.8 I guess... this is your answer
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2.25
so first I think
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sorry if it didn't help
