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3 years ago

Please answer this for me correctly. THANK YOU!!

Mathematics

1 answer:

Whitepunk [10]3 years ago

7 0

The answer is : angle MQL

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2 years ago

Terry lives 0.9 kilometers from school. He walks back and forth to school each day. How many kilometers does he walk to and from

julsineya [31]

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9 kilometers

Step-by-step explanation:

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3 years ago

Omar scored and 82% on his first test of the quarter.will score of 38 out of 50 on the second test help or hurt his grade?

lana [24]

38/50 so 19/25 which is 76%
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8 0

3 years ago

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.3. (Round your ans

Maurinko [17]

Answer:

0.0039 is the probability that the sample mean hardness for a random sample of 12 pins is at least 51.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 50

Standard Deviation, σ = 1.3

Sample size, n = 12

We are given that the distribution of hardness of pins is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

Standard error due to sampling =

$=\dfrac{\sigma}{\sqrt{n}} = \dfrac{1.3}{\sqrt{12}} = 0.3753$

P(sample mean hardness for a random sample of 12 pins is at least 51)

$P( x \geq 51) = P( z \geq \displaystyle\frac{51 - 50}{0.3753}) = P(z \geq 2.6645)$

$= 1 - P(z < 2.6645)$

Calculation the value from standard normal z table, we have,

$P(x \geq 51) = 1 - 0.9961= 0.0039$

0.0039 is the probability that the sample mean hardness for a random sample of 12 pins is at least 51.

3 0

3 years ago

25(M-2)=650 what is M ?

SVETLANKA909090 [29]

Answer:M=24

Step-by-step explanation:

5 0

3 years ago

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