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lapo4ka [179]
2 years ago
14

rac{9+\sqrt{17} }{2}" alt="\sqrt{\\\frac{9+\sqrt{17} }{2}" align="absmiddle" class="latex-formula">
Mathematics
1 answer:
Alborosie2 years ago
4 0

\huge\underline\pink{✏ANSWER}

<h2><em><u>Hello</u></em><em><u> </u></em><em><u>and</u></em><em><u> </u></em><em><u>sorry</u></em><em><u> </u></em><em><u>but</u></em><em><u> </u></em><em><u>it</u></em><em><u>'</u></em><em><u>s</u></em><em><u> </u></em><em><u>a</u></em><em><u> </u></em><em><u>Gatheted</u></em><em><u> </u></em><em><u>Question</u></em><em><u> </u></em><em><u>Can</u></em><em><u> </u></em><em><u>you</u></em><em><u> </u></em><em><u>fix</u></em><em><u> </u></em><em><u>it</u></em><em><u> </u></em><em><u>Can</u></em><em><u> </u></em><em><u>you</u></em><em><u>?</u></em><em><u> </u></em></h2>

<em><u>Sorry</u></em><em><u> </u></em><em><u>for</u></em><em><u> </u></em><em><u>answering</u></em><em><u> </u></em><em><u>a</u></em><em><u> </u></em><em><u>nonsense</u></em><em><u> </u></em>

<u>#BrainliestBunch</u>

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A certain brand of automobile tire has a mean life span of 35,000 miles, with a standard deviation of 2250 miles. Assume the lif
yawa3891 [41]

Answer:

Step-by-step explanation:

From the information given:

mean life span of a brand of automobile = 35,000

standard deviation of a brand of automobile = 2250 miles.

the z-score that corresponds to each life span are as follows.

the standard z- score formula is:

z = \dfrac{x - \mu}{\sigma}

For x = 34000

z = \dfrac{34000 - 35000}{2250}

z = \dfrac{-1000}{2250}

z = −0.4444

For x = 37000

z = \dfrac{37000 - 35000}{2250}

z = \dfrac{2000}{2250}

z = 0.8889

For x = 3000

z = \dfrac{30000 - 35000}{2250}

z = \dfrac{-5000}{2250}

z = -2.222

From the above z- score that corresponds to their life span; it is glaring  that the tire with the life span 30,000 miles has an unusually short life span.

For x = 30,500

z = \dfrac{30500 - 35000}{2250}

z = \dfrac{-4500}{2250}

z = -2

P(z) = P(-2)

Using excel function (=NORMDIST -2)

P(z) = 0.022750132

P(z) = 2.28th percentile

For x =  37250

z = \dfrac{37250 - 35000}{2250}

z = \dfrac{2250}{2250}

z = 1

Using excel function (=NORMDIST 1)

P(z) = 0.841344746

P(z) = 84.14th percentile

For x = 35000

z = \dfrac{35000- 35000}{2250}

z = \dfrac{0}{2250}

z = 0

Using excel function (=NORMDIST 0)

P(z) = 0.5

P(z) = 50th percentile

6 0
3 years ago
Plz help me look at the Picture
Tcecarenko [31]
Answer: C & E

40% is equal to 0.4 as a decimal. As a fraction it is equal to 2/5 in simplest form.

In order to find the present you would have to multiple one of the numbers above by the initial value 84.

If you would like further explanation let me know. :)
6 0
3 years ago
Hello!! I Need HElp ASAP PLEAASSEE
MatroZZZ [7]

Answer:

  a = -1

Step-by-step explanation:

The line of symmetry for the parabola given by ...

  y = ax² +bx +c

is

  x = -b/(2a)

Using the given values, we have ...

  -2 = -(-4)/(2a)

Multiplying by -a/2, we get ...

  a = (4/2)(-1/2) = -1

The value of "a" is -1.

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2 years ago
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