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3 years ago

What's 3.548 rounded to the nearest 100

Mathematics

2 answers:

svetoff [14.1K]3 years ago

7 0

3.548 rounded to the nearest 100 is 4.649

pentagon [3]3 years ago

3 0

I dont even know
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Aaron uses the equation y=500+0.2x to determine his weekly paycheck based on his sales volume, where y represents the amount of

lbvjy [14]

Answer:

1050 units

Explanations:

Given the equation y=500+0.2x to determine his weekly paycheck based on his sales volume, where:

y is the amount of his check

x is the number of units he sells each month.

In order to determine the amount of units he would need to sell for his paycheck to be $710, we willl substitute y = 710 into the equation and find the value of x as shown:

y=500+0.2x

710 = 500+0.2x

710-500 = 0.2x

210 = 0.2x

0.2x = 210

Divide both sides by 0.2

0.2x/0.2 = 210/0.2

x = 1050

Hence he would need 1,050 units to sell for his paycheck to be $710

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1 year ago

Suppose we are interested in analyzing the weights of NFL players. We know that on average, NFL players weigh 247 pounds with a

Diano4ka-milaya [45]

Answer:

a) The standard error would be of 8.58 pounds.

b) The margin of error is 14.11 pounds.

c) The 90% confidence interval for the population mean is between 232.89 pounds and 261.11 pounds

Step-by-step explanation:

a.What is the standard error?

The standard error is

$s = \frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample. So

$s = \frac{47}{\sqrt{30}} = 8.58$

The standard error would be of 8.58 pounds.

b.What is the margin of error at 90% confidence?

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.9}{2} = 0.05$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.05 = 0.95$ , so $z = 1.645$

Now, find the margin of error M as such

$M = z*s = 1.645*8.58 = 14.11$

The margin of error is 14.11 pounds.

c. Using my sample of 30, what would be the 90% confidence interval for the population mean?

Lower bound: Sample mean subtracted by the margin of error.

247 - 14.11 = 232.89 pounds

Upper bound

247 + 14.11 = 261.11 pounds

The 90% confidence interval for the population mean is between 232.89 pounds and 261.11 pounds

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3 years ago

Mark works in an paint factory. He pours 1,336 liters of paint into 8 barrels. He pours the same amount of paint into each barre

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C : 167 liters
1336 dived by 8=167

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Answer:

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2 years ago

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<span>2x=4
Divide 2 on both sides so that the only thing remaining on the left side is the variable x.
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