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lora16 [44]
3 years ago
11

Quais as raízes de: (x^2)-(2^x)-1=0

Mathematics
1 answer:
stiks02 [169]3 years ago
7 0

Answer:

Step-by-step explanation:

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A paint company claims their paint will be completely dry within 45 minutes after application. Recently, customers have complain
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The probability of observing a sample mean of x = 52 or greater from a sample size of 25 is 0.0000026

Step-by-step explanation:

Mean = \mu = 45

Population standard deviation =\sigma = 6

Sample size = n =25

Sample mean = \bar{x} = 52

We are supposed to find  the probability of observing a sample mean of x = 52 or greater from a sample size of 25 i.e.P(x\geq 52)

Z=\frac{x-\mu}{\frac{\sigma}{\sqrt{n}}}\\Z=\frac{52-45}{\frac{6}{\sqrt{25}}}

Z=5.83

P(Z<52)=0.9999974

P(Z\geq 52)=1-P(z

Hence  the probability of observing a sample mean of x = 52 or greater from a sample size of 25 is 0.0000026

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Winston goes to the store and buys a garden statue for $30. The store has sales tax rate of 5%. How much tax will Winston have t
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