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Murrr4er [49]
2 years ago
5

An engineer is planning a new water pipe installation. The circular pipe has a diameter of d = 20 centimeters. What is the area

(A) of the circular cross section of this pipe?
║Give your answer in terms of ⫪║

Mathematics
1 answer:
goldenfox [79]2 years ago
3 0

Answer:

radius=diameter/2=20/2

=10cm/100=0.1m

Area of a circle=πr^2

A=π×0.1×0.1

A=0.01πm^2

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Answer:

240

Step-by-step explanation:

-8(10×-3)

(10×3)=30

30×-8=240

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Determine whether the equation is an identity or whether it has no solution. 2(a-3)=4a(2a-6)​
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It has no solution.

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20. Based on student records, 25% of the students at a large high school have a
Elenna [48]

Answer:

(E) 0.71

Step-by-step explanation:

Let's call A the event that a student has GPA of 3.5 or better, A' the event that a student has GPA lower than 3.5, B the event that a student is enrolled in at least one AP class and B' the event that a student is not taking any AP class.

So, the  probability that the student has a GPA lower than 3.5 and is not taking any AP  classes is calculated as:

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it means that the students that have a GPA lower than 3.5 and are not taking any AP  classes are the complement of the students that have a GPA of 3.5 of better or are enrolled in at least one AP class.

Therefore, P(A∪B) is equal to:

P(A∪B) = P(A) + P(B) - P(A∩B)

Where the probability P(A) that a student has GPA of 3.5 or better is 0.25, the probability P(B) that a student is enrolled in at least one AP class is 0.16 and the probability P(A∩B) that a student has a GPA of 3.5 or better and is enrolled  in at least one AP class is 0.12

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P(A∪B) = P(A) + P(B) - P(A∩B)

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P(A'∩B') = 1 - P(A∪B)

P(A'∩B') = 1 - 0.29

P(A'∩B') = 0.71

5 0
3 years ago
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zane owns 6 stripe t-shirts,8 white t-shirt,and 4 solid coloured t-shirts.if zane picks a t-shirt at random,what is the probabil
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Answer:

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