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ahrayia [7]
3 years ago
10

What is the answer to w²-15w =0 ​

Mathematics
1 answer:
azamat3 years ago
3 0

Answer:

w = (0, 15)

Step-by-step explanation:

w²-15w =0

w(w-15)=0

w=0 , w=15

if w=0

0(0-15)=0

0(-15)=0

0=0

if w=15

15(15-15)=0

15(0)=0

0=0

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What is the length of the chord JK ?
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3 years ago
In a sample of 42 water specimens taken from a construction site, 26 contained detectable levels of lead. Construct a 95% conden
S_A_V [24]

Answer:

The 95% confidence interval for the proportion of water specimens that contain detectable levels of lead is (0.472,0.766).

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

In a sample of 42 water specimens taken from a construction site, 26 contained detectable levels of lead.

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95% confidence level

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The lower limit of this interval is:

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The 95% confidence interval for the proportion of water specimens that contain detectable levels of lead is (0.472,0.766).

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