49. Straight lines always equally 180 degrees. And the angle directly below P is equivalent to the 131 angle so 180-131=49 (hope that was somewhat explained well enough because angles are hard to explain without directly showing on paper)

7 0

3 years ago

Read 2 more answers

Write 3.48 as a decimal

zhenek [66]

3.48 is already written as a decimal

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if 3/48 = 0.0625 as a decimal

6 0

2 years ago

The distribution of heights for adult men in a certain population is approximately normal with mean 70 inches and standard devia

Allisa [31]

Answer:

The correct option is (C).

Step-by-step explanation:

Let X = heights for adult men in a certain population.

The random variable X follows a Normal distribution with mean μ = 70 inches and standard deviation, σ = 4 inches.

Compute the heights that represents the middle 80 percent of the heights as follows:

$P(x_{1}$

$P(\frac{x_{1}-\mu}{\sigma}$

$P(-z$

The value of z for the probability P (Z < z) = 0.90 is,

z = 1.282

*Use a z-table.

Compute the two heights as follows:

$-1.28=\frac{x_{1}-70}{4}\\x_{1}=70-(1.282\times 4)\\x_{1}=64.872\\x_{1}\approx 64.87$ $1.28=\frac{x_{2}-70}{4}\\x_{2}=70+(1.282\times 4)\\x_{2}=75.128\\x_{2}\approx 75.13$

Thus, the two heights which represents the middle 80 percent of the heights are 64.87 inches and 75.13 inches.

The correct option is (C).

7 0

2 years ago