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Afina-wow [57]
3 years ago
14

17 POINTS! I will also give Brainliest!

Mathematics
1 answer:
Karo-lina-s [1.5K]3 years ago
3 0

Answer:

c 39

Step-by-step explanation:

Parameter is the sum of the lengths of all sides of a polygon. The sides of the polygon are PT, TS, SR, RQ, and QP. To get the length of a side, we use the distance formula: Each vertex in the polygon has its corresponding points:\

So to get the length of side PT, we use the distance formula and the vertices of side PT:

The length of PT is

The same procedure is done for the other 4 sides and the following are the answers:

And by adding all the sides, you get the perimeter:

By rounding off, the answer is 39 units.

have a nice day

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Complete question:

He amount of time that a customer spends waiting at an airport check-in counter is a random variable with mean 8.3 minutes and standard deviation 1.4 minutes. Suppose that a random sample of n equals 47 customers is observed. Find the probability that the average time waiting in line for these customers is

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b) between 8 and 9 minutes

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Answer:

a) 0.0708

b) 0.9291

c) 0.0000

Step-by-step explanation:

Given:

n = 47

u = 8.3 mins

s.d = 1.4 mins

a) Less than 8 minutes:

P(X

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Using the normal distribution table:

NORMSDIST(-1.47)

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b) between 8 and 9 minutes:

P(8< X' <9) =[\frac{8-8.3}{1.4/ \sqrt{47}}< \frac{X'-u}{s.d/ \sqrt{n}} < \frac{9-8.3}{1.4/ \sqrt{47}}]

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Using normal distribution table,

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c) Less than 7.5 minutes:

P(X'<7.5) = P [Z< \frac{7.5-8.3}{1.4/ \sqrt{47}}]

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3 years ago
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3 years ago
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Answer:

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