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alina1380 [7]
3 years ago
13

According to a study done by De Anza students, the height for Asian adult males is normally distributed with an average of 66 in

ches and a standard deviation of 2.5 inches. Suppose one Asian adult male is randomly chosen. Let X = height of the individual. What is the probability that the person is between 65 and 69 inches?
Mathematics
1 answer:
trapecia [35]3 years ago
4 0

Answer: the probability that the person is between 65 and 69 inches is 0.54

Step-by-step explanation:

Since the height for Asian adult males is normally distributed, we would apply the formula for normal distribution which is expressed as

z = (x - µ)/σ

Where

x = height for Asian adult males.

µ = mean height

σ = standard deviation

From the information given,

µ = 66 inches

σ = 2.5 inches

We want to find the probability that the person is between 65 and 69 inches. It is expressed as

P(65 ≤ x ≤ 69)

For x = 65

z = (65 - 66)/2.5 = - 0.4

Looking at the normal distribution table, the probability corresponding to the z score is 0.34

For x = 69

z = (69 - 66)/2.5 = 1.2

Looking at the normal distribution table, the probability corresponding to the z score is 0.88

Therefore,

P(65 ≤ x ≤ 69) = 0.88 - 0.34 = 0.54

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Step-by-step explanation:

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Answer:

Step-by-step explanation:

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3 years ago
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Find a possible formula for a fourth degree polynomial g that has a double zero at -2, g(4) = 0, g(3) = 0, and g(0) = 12. g(x) =
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<h2>Answer:</h2>

The possible formula for a fourth degree polynomial g is:

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<h2>Step-by-step explanation:</h2>

We know that if a polynomial has zeros as a,b,c and d then the possible polynomial form is given by:

f(x)=m(x-a)(x-b)(x-c)(x-d)

Here the polynomial g  has a double zero at -2, g(4) = 0, g(3) = 0.

This means that the polynomial g(x) is given by:

g(x)=m(x-(-2))^2(x-4)(x-3)\\\\i.e.\\\\g(x)=m(x+2)^2(x-4)(x-3)\\\\i.e.\\\\g(x)=m(x^2+2^2+2\times 2\times x)(x(x-3)-4(x-3))\\\\i.e.\\\\g(x)=m(x^2+4+4x)(x^2-3x-4x+12)\\\\i.e.\\\\g(x)=m(x^2+4+4x)(x^2-7x+12)\\\\i.e.\\\\g(x)=m[x^2(x^2-7x+12)+4(x^2-7x+12)+4x(x^2-7x+12)]\\\\i.e.\\\\g(x)=m[x^4-7x^3+12x^2+4x^2-28x+48+4x^3-28x^2+48x]\\\\i.e.\\\\g(x)=m[x^4-7x^3+4x^3+12x^2+4x^2-28x^2-28x+48x+48]\\\\i.e.\\\\g(x)=m[x^4-3x^3-12x^2+20x+48]

Also,

g(0)=12

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48m=12\\\\i.e.\\\\m=\dfrac{12}{48}\\\\i.e.\\\\m=\dfrac{1}{4}

Hence, the polynomial g(x) is given by:

g(x)=\dfrac{1}{4}(x^4-3x^3-12x^2+20x+48)

8 0
3 years ago
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Answer:

208⅓ ft²

Step-by-step explanation:

The dimensions of Rachel's living room are 80 times the measurements on the scale drawing.

Calculate the width:

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Convert the mixed number to an improper fraction     = 80 × 15/8

Cancel the 8s                                                                  = 10 × 15

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Convert the improper fraction to a mixed number      = (144 + 6)/12

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= 625/3

Convert the improper fraction to a mixed number    

= (624 + 1)/3

= 208⅓ ft²

The area of Rachel's living room is 208⅓ ft².

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