All categories

3 years ago

The question is below

Mathematics

2 answers:

anastassius [24]3 years ago

8 0

Answer:

uh there is no question below

Step-by-step explanation:

omeli [17]3 years ago

4 0

Answer:

Whats the question

Step-by-step explanation:

brainliest

You might be interested in

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

A person wants to increase a (5 in. by 7 in.) photo to an (8 in. by 10 in.) but since the aspect ratios are not the same some of

Llana [10]

Answer:

89.3

Step-by-step explanation:

3 0

3 years ago

State if the two triangles are congruent. If they are, state how you know.

Gwar [14]

Answer:

The triangles can be congruent.

Step-by-step explanation:

They are congruent if proven by SSS: 2 sides are clearly stated that they are congruent due to the marks they have.

The last side can be congruent if the diagonals are congruent in length by proving.

They can also be congeuent due to SAS because there is gonna be alternate interior angles due to the transversal.

4 0

3 years ago

Consider the function f(x) = x2 + 2x – 15. What are the x-intercepts of the function?

Gnom [1K]

Answer:

Left-most x-intercept: (-5,0)

Right-most x-intercept: (3,0)

Step-by-step explanation:

X-intercepts are also known as roots, when y = 0.

In this function, y = 0 when x = -5 and x = 3.

6 0

3 years ago

(a) A square has a perimeter of 32 ft. What is the length of each side?

vitfil [10]

A. 32/4=8
B. Square root of 9 = 3

7 0

3 years ago