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Firdavs [7]
3 years ago
6

Solve the problem 8 + [(8 × 5) – 10] = ? A. 46 B. 38 C. 58 D. 30

Mathematics
2 answers:
mario62 [17]3 years ago
8 0

For this case, we must resolve the following expression:

8 + [(8 * 5) -10] =

We solve the multiplication within the parenthesis, to eliminate it:

8+ [40-10] =

As a second step, we solve the subtraction:

8 + 30 =

Finally, we add:

38

So, 8 + [(8 * 5) -10] = 38

Answer:

Option B


Vsevolod [243]3 years ago
4 0

Answer:

The answer is A. 38

Step-by-step explanation:

8 + [(8 x 5) - 10] =

8 + (40 - 10) =

8 + 30 = 38

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A new fertilizer was applied to the soil of 146 bean plants. 23% showed increased growth. Find the margin of error and 95% confi
USPshnik [31]

Answer:

The significance level for this case would be \alpha=1-0.95=0.05 and the critical value for this case would be:

z_{\alpha/2}=1.96

The margin of error is given by:

ME = z_{\alpha/2} \sqrt{\frac{\hat p (1-\hat p)}{n}}

And replacing we got:

ME = 1.96 \sqrt{\frac{0.23*(1-0.23)}{146}} =0.0683

And the margin of error for this case would be ME = 0.07

Step-by-step explanation:

For this case we have the following dataset given:

n= 146 represent the sample size

\hat p =0.23 represent the estimated proportion of interest

Conf=0.95 represent the confidence level

The significance level for this case would be \alpha=1-0.95=0.05 and the critical value for this case would be:

z_{\alpha/2}=1.96

The margin of error is given by:

ME = z_{\alpha/2} \sqrt{\frac{\hat p (1-\hat p)}{n}}

And replacing we got:

ME = 1.96 \sqrt{\frac{0.23*(1-0.23)}{146}} =0.0683

And the margin of error for this case would be ME = 0.07

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3 years ago
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