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PtichkaEL [24]
4 years ago
13

Rhonda deposited $3000 in an account in the Merrick National Bank, earning 4.2% interest,

Mathematics
2 answers:
jolli1 [7]4 years ago
8 0
The equation would be (3000x.042x1) thats how much interest she earns, then add that a,ount to 3000
topjm [15]4 years ago
4 0
You would use the equation a(1+/-%)^t. The a is the amount of the 3000. The percent goes there but you have to put it in decimal form so if you have to round to a specific spot then round to that spot. The t is the time so you would actually write it as: 3000(1+0.042)^t=B
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Answer:

Y=4x+18

Step-by-step explanation:

do whats in the parenthesis first and then you can solve from there

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3 years ago
How many athletes exercised more than 40 but less than 60 minutes
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3 years ago
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Dylan wants to determine a 90 percent confidence interval for the true proportion of high school students in the area who attend
Over [174]

Answer:

n=\frac{0.5(1-0.5)}{(\frac{0.03}{1.64})^2}=747.11  

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Step-by-step explanation:

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 90% of confidence, our significance level would be given by \alpha=1-0.90=0.1 and \alpha/2 =0.05. And the critical value would be given by:

z_{\alpha/2}=-1.64, z_{1-\alpha/2}=1.64

The margin of error for the proportion interval is given by this formula:  

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

And on this case we have that ME =\pm 0.03 and we are interested in order to find the value of n, if we solve n from equation (a) we got:  

n=\frac{\hat p (1-\hat p)}{(\frac{ME}{z})^2}   (b)  

The best estimatr for the proportionis 0.5 since we don't have any other info provided. And replacing into equation (b) the values from part a we got:

n=\frac{0.5(1-0.5)}{(\frac{0.03}{1.64})^2}=747.11  

And rounded up we have that n=748

5 0
3 years ago
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lutik1710 [3]

Answer:

11/25

Step-by-step explanation:

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6 0
3 years ago
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Reil [10]

Answer:

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4 0
3 years ago
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