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2 years ago

A battery manufacturer randomly tests 500 batteries and finds that 3 are defective.

Mathematics

2 answers:

Alexxx [7]2 years ago

8 0

(3/500)*(12,000) = 72 batteries . . . answer is B) 72

Gala2k [10]2 years ago

7 0

If you set up the problem and put 500 / 3 = 12,000 / x, you could cross multiply. 12,000 times 3 = 500 times x.
36,000 = 500x Now divide both sides by 500.
72 = x
The answer is B.72!

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The lengths of pregnancies are normally distributed with a mean of 268 days and a standard deviation of 15 days. a. Find the pro

Bogdan [553]

Answer:

Step-by-step explanation:

Let X be the length of pregnancy.

X is N(268, 15)

a) Prob of pregnancy lasting 307 days or longer

= P(X>307) = $P(Z>\frac{307-268}{15} )\\=P(Z>2.6)\\$

=0.5-0.4953

=0.0047

b) Lowest 2% is 2nd percentile

Z=-2.55

X score = 268-2.55(15)

= 229.75 days

If length of days >230 days then it is not premature.

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2 years ago

Please help me Show your work

GrogVix [38]

ANSWER TO PART A

The given triangle has vertices $J(-4,1), K(-4,-2),L(-3,-1)$

The mapping for rotation through $90\degree$ counterclockwise has the mapping

$(x,y)\rightarrow (-y,x)$

Therefore

$J(-4,1)\rightarrow J'(-1,-4)$

$K(-4,-2)\rightarrow K'(2,-4)$

$L(-3,-1)\rightarrow L'(1,-3)$

We plot all this point and connect them with straight lines.

ANSWER TO PART B

For a reflection across the y-axis we negate the x coordinates.

The mapping is

$(x,y)\rightarrow (-x,y)$

Therefore

$J(-4,1)\rightarrow J''(4,1)$

$K(-4,-2)\rightarrow K''(4,-2)$

$L(-3,-1)\rightarrow L''(3,-1)$

We plot all this point and connect them with straight lines.

See graph in attachment

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3 years ago

What is the answer 5(x-4)=3x+4

ruslelena [56]

Step-by-step explanation:

Simplify the left side:

5x - 20 = 3x + 4

Move all terms containing x to the left side of the equation:

2x - 20 = 4

Move all terms not containing x to the right side of the equation:

2x = 24

Divide each term by 2 and simplify:

x = 12

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2 years ago

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vitfil [10]

Answer:

<h2>C) Public Company Accounting Oversight Board</h2><h3>(PCAOB)</h3>

Step-by-step explanation:

The PCAOB is a nonprofit corporation established by Congress to oversee the audits of public companies in order to protect investors and further the public interest in the preparation of informative, accurate, and independent audit reports.

#hope it helps!

Answered by ReyvREYV111

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1 year ago

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Answer:

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