If ANYONE, anyone AT ALL can help me out with those last few questions it would help me out SO MUCH???

kondor19780726 [428]

I thinks it’s between A and B

3 0

3 years ago

To obtain information on the corrosion-resistance properties of a certain type of steel conduit, 45 specimens are buried in soil

Fiesta28 [93]

Answer:

The sample has not met the required specification.

Step-by-step explanation:

As the average of the sample suggests that the true average penetration of the sample could be greater than the 50 mils established, we formulate our hypothesis as follow

$H_0$ : The true average penetration is 50 mils

$H_a$ : The true average penetration is > 50 mils

Since we are trying to see if the true average is greater than 50, this is a right-tailed test.

If the level of confidence is α = 0.05 then the $z_\alpha$ score against we are comparing with, is 1.64 (this is because the area under the normal curve N(0;1) to the right of 1.64 is 0.05)

The z-score associated with this test is

$z=\frac{\bar x-\mu}{s/\sqrt{n}}$

where

$\bar x$ = mean of the sample

$\mu$ = average established by the specification

s = standard deviation of the sample

n = size of the sample

Computing this value of z we get z = 3.42

Since z > $z_\alpha$ we can conclude that the sample has not met the required specification.

5 0

3 years ago

What is the value of x in the triangle below? 40 70 140 160

Mumz [18]

Answer:

where is the Triangle below

6 0

3 years ago

Gene then reflected (-0.3, 7/10) over the y axis and then over the x axis what are the coordinates of the point after two reflec

lyudmila [28]

The coordinates of the point after the two reflections are (0.3,-7/10).

<h3>What is the reflection?</h3>

A reflection is a mapping from an isometric hyperplane with a set of fixed points acting as the reflection's axis or plane from a Euclidean space to itself. A figure's reflection creates its mirror image of that figure in the plane or axis of the reflection.

Given that, the point (-0.3, 7/10) is reflected over the y-axis and then over the x-axis respectively.

The coordinates of the point after the reflection in the y-axis are:
(0.3, 7/10)

Now, the coordinates of the point after the reflection in the x-axis are:
(0.3, -7/10)

Hence, the coordinates of the point after the two reflections are (0.3,-7/10).

Learn more about the reflection:

brainly.com/question/15487308

#SPJ1

3 0

1 year ago

5. A set of 9 books has 5,487 pages.

ANTONII [103]

The answer would be 5487/9 since it says each book has the same number of pages

7 0

2 years ago