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ladessa [460]
2 years ago
6

Find the value of each variable. Round to the nearest tenth if

Mathematics
1 answer:
solniwko [45]2 years ago
8 0

Answer:

the snnswer is 47 not no other answer

Step-by-step explanation:

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2 years ago
A boat travels for 4 hours at a constant speed of 35.25 km/h.
Black_prince [1.1K]
Again set a proportion
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2 years ago
Find the sample size required to achieve the given margin of error with SD = 51.02 and z - score = 1.96. Round your answer to th
coldgirl [10]

Answer:

The sample size required is 2500.

Step-by-step explanation:

z-score:

In function of the margin of error M, the z-score is given by:

Z = \frac{M}{\frac{\sigma}{\sqrt{n}}} = \frac{M\sqrt{n}}{\sigma}

In this question, we have that:

\sigma = 51.02, M = 2, Z = 1.96

So

Z = \frac{M\sqrt{n}}{\sigma}

1.96 = \frac{2\sqrt{n}}{51.02}

2\sqrt{n} = 51.02*1.96

\sqrt{n} = \frac{51.02*1.96}{2}

(\sqrt{n})^2 = (\frac{51.02*1.96}{2})^2

n = 2500

The sample size required is 2500.

3 0
3 years ago
Lines a,b,c, and d are in the same plane. Line a is parallel to line c. Lines b and c are perpendicular to line d. Based on this
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Line A and B is perpendicular
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