3 years ago

Find 59.2% of 250...................................

Mathematics

1 answer:

Katarina [22]3 years ago

5 0

Answer:

148

Step-by-step explanation:

just searched it up good luck sorry if its wrong

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The weights of adobe bricks used for construction are normally distributed with a mean of 3 pounds and a standard deviation of 0

dedylja [7]

Answer: a) 0.8413, b) 0.9987.

Step-by-step explanation:

Since we have given that

Mean = 3 pounds

Standard deviation = 0.25 pounds

n = 28 bricks

So, (a) What is the probability that all the bricks in the sample exceed 2.75 pounds?

$P(X>2.75)\\\\=P(z>\dfrac{2.75-3}{0.25}\\\\=P(z>\dfrac{-0.25}{0.25})\\\\=P(z>-1)\\\\=0.8413$

b) What is the probability that the heaviest brick in the sample exceeds 3.75 pounds?

$P(X>3.75)\\\\=P(z>\dfrac{3.75-3}{0.25})\\\\=P(z>\dfrac{0.75}{0.25})\\\\=P(z>3)\\\\=0.9987$

Hence, a) 0.8413, b) 0.9987.

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3 years ago

Simplify the expression below:<br> (-5x² + 2) - (4x² – 5x - 9)

lozanna [386]

Answer:

-9x² + 5x + 11

Step-by-step explanation:

-5x² + (-4x²) + 5x + 2 + 9

-9x² + 5x + 11

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2 years ago

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devlian [24]

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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2 years ago

Find the area of the figure.

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look at the attached picture

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3 years ago

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