673 grams round to nearest 10 grams

Mathematics

2 answers:

natima [27]3 years ago

8 0

673 grams is closer to 670 than 680.
so 673 is rounded to 670 grams.

iren2701 [21]3 years ago

3 0

The answer is 670 because it is closer to thay

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tigry1 [53]

<h2>Answer with explanation:</h2>

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$\hat{p}\pm z_{\alpha/2}\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}$

, where $\hat{p}$ is the sample proportion, n is the sample size , $z_{\alpha/2}$ is the critical z-value.

The values needed to calculate a confidence interval at the 99% confidence level are :

Given : Significance level : $\alpha:1-0.99=0.01$

Sample size : n=450

Critical value : $z_{\alpha/2}=2.576$

Sample proportion: $\hat{p}=\dfrac{280}{450}\approx0.62$

Now, the 99% confidence level will be :

$\hat{p}\pm z_{\alpha/2}\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}\\\\=0.62\pm(2.576)\sqrt{\dfrac{0.62(1-0.62)}{450}}\\\\\approx0.62\pm0.023\\\\=(0.62-0.023,\ 0.62+0.023)=(0.597,\ 0.643)$

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6 0

3 years ago

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White raven [17]

<span>6x – 7y = 16
2x + 7y = 24

This system is easily solvable by the elimination method as the y-terms are opposites of each other. You may add the two equations together and they will cancel out.

</span> 6x – 7y = 16
2x + 7y = 24
+___________
8x – 0 = 40
8x = 40
x = 5

Substitute 5 for x into either of the above equation and solve algebraically for y.

2x + 7y = 24
2(5) + 7y = 24
10 + 7y = 24
7y = 14
y = 2

Check work by plugging both x- and y-values into each original equation.

6x – 7y = 16 => 6(5) – 7(2) = 16 => 30 – 14 = 16
2x + 7y = 24 => 2(5) + 7(2) = 24 => 10 + 14 = 24

Answer:
x = 5; y = 2

(5, 2)

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3 years ago

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Answer:

Step-by-step explanation:

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