Answer:
The 90% confidence interval for the true mean natural gas bill for homes in the 19808 zip code area in February is between $292.48 and $331.32
Step-by-step explanation:
We have the standard deviation for the sample, which means that the t-distribution is used to solve this question.
The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So
df = 21 - 1 = 20
90% confidence interval
Now, we have to find a value of T, which is found looking at the t table, with 20 degrees of freedom(y-axis) and a confidence level of 
. So we have T = 1.7247
The margin of error is:
In which s is the standard deviation of the sample and n is the size of the sample.
The lower end of the interval is the sample mean subtracted by M. So it is 311.9 - 19.42 = $292.48
The upper end of the interval is the sample mean added to M. So it is 311.9 + 19.42 = $331.32
The 90% confidence interval for the true mean natural gas bill for homes in the 19808 zip code area in February is between $292.48 and $331.32
If <em>x</em> is the smallest of the three, then the next two integers are <em>x</em> + 2 and <em>x</em> + 4.
"Twice the largest is 20 less than the sum of all three" translates to
2 (<em>x</em> + 4) = (<em>x</em> + (<em>x</em> + 4) + (<em>x</em> + 6)) - 20
Solve for <em>x</em> :
2<em>x</em> + 8 = 3<em>x</em> - 10
<em>x</em> = 18
Then the three numbers are {18, 20, 22}.
Answer:
<h3>5ths</h3>
Step-by-step explanation:
Given that:
- Price of whole pizza (A) = 5 × 3 = $15
- Price of whole pizza (B) = 4.50 × 5 = $22.50
They make 8 whole pizzas.
Therefore
- Thirds (A) = 15 × 8 = $120
- Fifths (B) = 22.50 × 8 = $180
They'll make more money if they slice it into fifths.
180 - 120 = $60
Because if they slice it into thirds, total profit will be $60 less
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#IndonesianPride - kexcvi
the radius of the distance between the middle point of the circle and the outside, we have the diameter which is 6 so the <u>radius will be 3</u>
slant height is
h is 4.7 and r is 3
<u>slant height is 5.58427</u>
lateral surface area
<u>lateral surface area is 52.63053</u>
total surface area
<u>total surface area is 80.90486</u>
Answer:
<h2>
</h2>
Step-by-step explanation:
s = πrl + πr²
First move πr² to the left side of the equation
We have
πrl = s - πr²
Divide both sides by πr to make l stand alone
That's
<h3>
</h3>
We have the final answer as
<h3>
</h3>
Hope this helps you
