2 years ago

The result of a subtraction problem is called a quotient

Mathematics

1 answer:

Shalnov [3]2 years ago

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The answer to a divisionproblem

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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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2 years ago

Jordan and Beth are mixing yellow and blue paint to make green paint.

nata0808 [166]

Answer:

Jordan

Step-by-step explanation:

Jordan 5:2 -> 10:4, 15:6 20:8 25:10 50:20 60:24 70:28

Beth 18:7-> 36:14 54:21 72:28

When Both of them add 28 of BLUE paint, Jordan adds only 70 yellow paint, while Beth uses 72 yellow paint. This would make Jordan's green darker.

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2 years ago

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Answer:

Step-by-step explanation:

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a builder has built 1/6 of the floors of a new skyscraper.if the builder has built 13 floors,how many floors will the skyscraper

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You do 13 times 6

this equals, 78 floors

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