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kvv77 [185]
3 years ago
12

A certain chalkboard manufacturer determines that their largest blackboard model has a mean length of 5.00 m and a standard devi

ation of 1.0 cm. A certain school district orders 1000 of these chalkboards. How many are likely to have lengths of under 4.98 m?
Mathematics
1 answer:
Igoryamba3 years ago
7 0

Answer:

23 chalkboards

Step-by-step explanation:

Given:

Mean length = 5 m

Standard deviation = 0.01

Number of units ordered = 1000

Now,

The z factor = \frac{\textup{x - Mean}}{\textup{standard deviation}}

or

The z factor = \frac{\textup{4.98 - 5}}{\textup{0.01}}

or

Z = - 2

Now, the Probability P( length < 4.98 )

Also, From z table the p-value = 0.0228

therefore,

P( length < 4.98 ) = 0.0228

Hence, out of 1000 chalkboard ordered (0.0228 × 1000) = 23 chalkboard are likely to have lengths of under 4.98 m.

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<span>
y = 7 + 3/5
y = 35/5 + 3/5
y = 38/5
y = 2*(38/5)
y = 76/10
---
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z = 5*(1/2)
z = 5/10
---
time switching classes:
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---
y - 6x - z - w = 0
6x = y - z - w
x = (y - z - w)/6
x = (76/10 - 5/10 - 7/10)/6
x = (76 - 5 - 7)/(10*6)
x = (64)/(10*6)
x = (2*2*2*2*2*2)/(2*5*2*3)
x = (2*2*2*2)/(5*3)
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---
check:
y = 7 + 3/5
y = 7.6
z = 1/2
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w = 0.7
y - 6x - z - w = 0
6x = y - z - w
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x = (7.6 - 0.5 - 0.7)/6
x = 1.0666666666

answer:
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What two step equation when solved does x=-3
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Answer:

x + 3 = 0.

Step-by-step explanation:

One would be:

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Jackson used the process of completing the square to solve the equation 2x2−12x=−6.
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Answer:

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Step-by-step explanation:

we are given equation as

2x^2-12x=-6

Since, we have to solve it by using complete square

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Factor 2 from both sides

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step-2:

Simplify it

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now, we can complete square

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Take sqrt both sides

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step-5:

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I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!


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