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vfiekz [6]
3 years ago
14

Can I PLEASE get some help?

Mathematics
1 answer:
V125BC [204]3 years ago
7 0
The 1st and 3rd choices are irrational.  The other 2 are rational.  Irrational numbers are numbers that you can't make a simple fraction out of.
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Stells [14]

x = number of hours

want to find probability (P) x >= 13

x is N(14,1) transform to N(0,1) using z = (x - mean) / standard deviation so can look up probability using standard normal probability table.

P(x >= 13) = P( z > (13 - 14)/1) = P(z > -1) = 1 - P(z < -1) = 1 - 0.1587 = 0.8413

To convert that to percentage, multiply 100, to get 84.13%

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3 years ago
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KonstantinChe [14]
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2 years ago
Please help ASAP will brainliest
NikAS [45]

Step-by-step explanation:

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3 years ago
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If a number is decreased by 8, the result is -21. What is the
wariber [46]

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answer = -13

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