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Varvara68 [4.7K]
1 year ago
10

A small amphitheater has 8 rows that have 42 seats in each row. If an act needs to keep the first row empty but has all the rest

of the seats sold, then what expression can be used to find the total attendance? 8 × 40 + 8 × 2 8 × 40 – 8 × 2 7 × 40 + 7 × 2 7 × 40 – 7 × 2
Mathematics
1 answer:
jok3333 [9.3K]1 year ago
4 0

Answer:

i dont know sorry

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

From the question we are told that

  The  mean is  \mu =  7.5

  The standard deviation is  \sigma  =  0.2

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Generally the probability that the selected pool has a pH level that is not considered safe is mathematically represented as

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Here  

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=>  P(7.2 < X  < 7.8 ) = P(Z <  1.5) - P(  Z < - 1.5)

From the z-table the probability of  (Z <  -1.5) and   (  Z <1.5)  are

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So

      P(7.2 < X  < 7.8 ) =0.93319 - 0.066807

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=>  P(A) =  0.133617

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