21. For the previous problem, what percentage of the variation in age is explained by the regression fit using dentine content? (a) 98.4% (b) 48.5% (c) 40.6% (d) 63.7% Question 22 22. For the previous problem, give an estimate for o. (a) 9.919 (b) 787.11 (c) 538.89 (d) 98.4 (e) 23.21 b.

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A: To find the equation of the directrix of the parabola shown in the figure below.

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A:

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A:

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A:

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Q: Which of these choices is equivalent to the expression: O B. P O D.

A: Complex number: We know, i2=-185=2*42+1

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A:

Q: 2+V2+/2+20 do

A: ∫2=2+2+2  cosθ   dθ ∫2+2+21+cosθ  dθ  ∵1+cos θ=2 cos2θ ∫2+2+2×2 cos2θ  dθ

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A:

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A:

Q: Consider events A and B with the following probabilities: P(A) = 0.5 P(B) = 0.6 P(A and B) = 0.1

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A: Solve determinant  as general

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A:

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A: Given query is to find possible value for y.