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Paladinen [302]
3 years ago
11

A mouse walks in a maze that is an orthogonal grid made of corridors that intersect at crossings one foot apart, stopping at eve

ry intersection. Using coordinates (with units in feet), it starts at the origin, then moves equally likely up to (0, 1) or down to (0, −1) or right to (1, 0) or left to (−1, 0) by one unit until the next crossing. Then it stops, picks another random direction (up, down, right or left) equally likely and moves by another unit till the next crossing. Every time it stops, its position is a vector (a, b) where both a and b are integers. Scientists let the mouse walk n feet, after which its position is (X, Y ) and it is at distance D from the origin (D = √ X2 + Y 2).
a) What is Cov(X,Y)?
b) Are X and Y independent?
c) What is E(DP)?

Mathematics
1 answer:
aksik [14]3 years ago
5 0

Answer:

See the attached file for the answer.

Step-by-step explanation:

See the attached file for the explanation.

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Answer:

Therefore the required polynomial is

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Step-by-step explanation:

Given that M is a polynomial of degree 3.

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The two zeros of the polynomial are -4 and 4i.

Since 4i is a complex number. Then the conjugate of 4i is also a zero of the polynomial i.e -4i.

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      =a(x+4)(x²+16)      [∵i² = -1]

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53.12 =a(0+4.0+16.0+64)

\Rightarrow a = \frac{53.12}{64}

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Therefore the required polynomial is

M(x)=0.83(x³+4x²+16x+64)

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