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3 years ago

Please help, its homework not finished

Mathematics

2 answers:

Neporo4naja [7]3 years ago

4 0

1) -0.4

2) 3

3) -37

For each I just subsitubed

1) 3(1.2)-4

3.6-4 = -0.4

2) 12-(9)=3

3) 4(2)-45

8-45=-37

Citrus2011 [14]3 years ago

3 0

1) -0.4

2) 3

3) -37

For each I just subsitubed

1) 3(1.2)-4

3.6-4 = -0.4

2) 12-(9)=3

3) 4(2)-45

8-45=-37

that is the answer

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Assume that women's heights are normally distributed with a mean given by mu equals 62.5 in,and a standard deviation given by

Misha Larkins [42]

Answer:

(a) 0.5899

(b) 0.9166

Step-by-step explanation:

Let X be the random variable that represents the height of a woman. Then, X is normally distributed with

$\mu$ = 62.5 in

$\sigma$ = 2.2 in

the normal probability density function is given by

$f(x) = \frac{1}{\sqrt{2\pi}2.2}\exp{-\frac{(x-62.5)^{2}}{2(2.2)^{2}}}$ , then

(a) $P(X < 63) = \int\limits_{-\infty}^{63}f(x) dx$ = 0.5899

(in the R statistical programming language) pnorm(63, mean = 62.5, sd = 2.2)

(b) We are seeking $P(\bar{X} < 63)$ where n = 37. $\bar{X}$ is normally distributed with mean 62.5 in and standard deviation $2.2/\sqrt{37}$ . So, the probability density function is given by

$g(x) = \frac{1}{\sqrt{2\pi}\frac{2.2}{\sqrt{37}}}\exp{-\frac{(x-62.5)^{2}}{2(2.2/\sqrt{37})^{2}}}$ , and

$P(\bar{X} < 63) = \int\limits_{-\infty}^{63}g(x)dx$ = 0.9166

(in the R statistical programming language) pnorm(63, mean = 62.5, sd = 2.2/sqrt(37))

You can use a table from a book to find the probabilities or a programming language like the R statistical programming language.

4 0

3 years ago

Please give me the right answer?

baherus [9]

(5 3/10) (m) + (5 3/10) (m) + (5 3/10) (m) + (5 3/10) (m)

P = 53/10 + 5 3/10 + 5 3/10 + 5 3/10

P = 53/10 + 53/10 + 5 3/10 + 5 3/10

P = 53/5 + 5 3/10 + 5 3/10

P = 53/5 + 53/10 + 5 3/10

P = 159/10 + 5 3/10

P = 159/10 + 53/10

P = 106/5

P = 21 1/5 meters

Answer: 21 1/5 meters (Decimal: 21.2m)

Hope that helps!!!! Have a great day!!!! : )

7 0

3 years ago

Leon got a reduction of $40 on a Geometry set

SSSSS [86.1K]

I pretty sure this one is b

6 0

2 years ago

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Which lines are parallel? Check all that appley

7nadin3 [17]

Answer:

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Step-by-step explanation:

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3 years ago

4 of the 9 tiles in the floor pattern are white. What percent of the tiles are white?

choli [55]

Answer:

44.5%

Step-by-step explanation:

THis is because 4/9x100=44.5, which means that 44.5% of the tiles are white

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2 years ago