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2 years ago

Can someone help me with this

Mathematics

2 answers:

Elanso [62]2 years ago

6 0

Answer:

1,256 dm^2 and 400π dm^2

Step-by-step explanation:

The circumference is equal to 2pi times the radius. So 40pi=2pi times the radius so the radius is 20. The area of a circle is pi times the radius squared or 400pi and if using 3.14 for pi this would be 1,256 dm^2

valkas [14]2 years ago

5 0

Shi why is everything answered already

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notka56 [123]

Answer:

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Step-by-step explanation:

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Answer:

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3 years ago

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MariettaO [177]

Answer:

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Step-by-step explanation:

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$X_1 = 1000000 , P(X_1)= 0.0000005$

$X_2 = 200000 , P(X_2)= 0.000002$

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$X_4 = -2, P(X_4) = 1-0.0000005-0.000002-0.00001= 0.9999875$

And then replacing we have this for the expected value:

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And after do the math we got:

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