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777dan777 [17]
2 years ago
14

In __________, the air bags system checks itself for problems each time the ignition is turned on

Engineering
1 answer:
zlopas [31]2 years ago
8 0

Answer:

===========

Automobiles

===========

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I. The time till failure of an electronic component has an Exponential distribution and it is known that 10% of components have
drek231 [11]

Answer:

(a) The mean time to fail is 9491.22 hours

The standard deviation time to fail is 9491.22 hours

(b) 0.5905

(c) 3.915 × 10⁻¹²

(d) 2.63 × 10⁻⁵

Explanation:

(a) We put time to fail = t

∴ For an exponential distribution, we have f(t) = \lambda e^{-\lambda t}

Where we have a failure rate = 10% for 1000 hours, we have(based on online resource);

P(t \leq 1000) = \int\limits^{1000}_0 {\lambda e^{-\lambda t}} \, dt = \dfrac{e^{1000\lambda}-1}{e^{1000\lambda}} = 0.1

e^(1000·λ) - 0.1·e^(1000·λ) = 1

0.9·e^(1000·λ) = 1

1000·λ = ㏑(1/0.9)

λ = 1.054 × 10⁻⁴

Hence the mean time to fail, E = 1/λ = 1/(1.054 × 10⁻⁴) = 9491.22 hours

The standard deviation = √(1/λ)² = √(1/(1.054 × 10⁻⁴)²)) = 9491.22 hours

b) Here we have to integrate from 5000 to ∞ as follows;

p(t>5000) = \int\limits^{\infty}_{5000} {\lambda e^{-\lambda t}} \, dt =\left [  -e^{\lambda t}\right ]_{5000}^{\infty} = e^{5000 \lambda} = 0.5905

(c) The Poisson distribution is presented as follows;

P(x = 3) = \dfrac{\lambda ^x e^{-x}}{x!}  = \frac{(1.0532 \times 10^{-4})^3 e^{-3} }{3!}  = 3.915\times 10^{-12}

p(x = 3) = 3.915 × 10⁻¹²

d) Where at least 2 components fail in one half hour, then 1 component is expected to fail in 15 minutes or 1/4 hours

The Cumulative Distribution Function is given as follows;

p( t ≤ 1/4) CDF = 1 - e^{-\lambda \times t} = 1 - e^{-1.054 \times 10 ^{-4} \times 1/4} = 2.63 \times 10 ^{-5}.

4 0
3 years ago
A customer executive from Southeast Asia will visit your HQ facility and meet with your
Rufina [12.5K]

<u>Answer</u>:

Say no!

Explanation:

<u>Remember</u>, this scenario is an ethical dilemma. Been ethical implies doing what's professionally right, and as such saying no to that request is the right need to do. In the workplace a company's policies should be obeyed always by individual employees even though some may resent it.

7 0
3 years ago
To embed a video using a plug-in, point to _______________ on the Insert menu and click Plugin.
babunello [35]

Answer:

d

Explanation:

8 0
2 years ago
he __________ at the bottom of the screen displays single-line help tips and displays information pertinent to the active operat
ser-zykov [4K]

The<u> STATUS BAR </u>at the bottom of the screen displays single-line help tips and displays information pertinent to the active operations

Explanation:

  • A status bar is located at the bottom of the browser window and displays the current state of the web page or application being displayed.
  • It is used by some applications to display helpful information for the user.
  • Web browsers use the status bar to display the Web address of a link when the user moves the cursor over it.
  • The status bar also shows the status of loading pages, and displays error messages.
  • A status bar is a graphical control element which poses an information area typically found at the window's bottom.
  • It can be divided into sections to group information together. When information is grouped it is easier to search for specific content.
  • The job of the status bar is primarily to display information about the current state of its window, although some status bars have extra functionality.
8 0
2 years ago
Most car owners drive their cars an average of 12,000 miles a year assuming a 20 miles a gallon gas consumption rate determine t
solniwko [45]

Answer:

9×10¹⁰ gallons

Explanation:

150×10⁶ cars × (12000 mi / car) × (1 gal / 20 mi) = 9×10¹⁰ gallons

8 0
2 years ago
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