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3 years ago

A sphere has a diameter of 10 in. What is the volume of the sphere?

Mathematics

1 answer:

Sergio039 [100]3 years ago

6 0

20. Double the size

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A line segment has end points of ( 4,-4) and ( 0-5) what are the coordinates of the midpoint of this line segment?

Leni [432]

Use the Midpoint formula

Under a radical it would be

√ ( x↓2 - x↓1 ) ² + ( y↓2 - y↓1 ) ²

The down arrow is subscript -

So use the numbers from the two coordinates to plug in.

If you have any question comment :)

5 0

4 years ago

Mortgage rates: Following are interest rates (annual percentage rates) for a 30-year fixed rate mortgage from a sample of lender

andreev551 [17]

Answer:

98% Confidence interval: (4.144 ,4.498)

Step-by-step explanation:

We are given the following in the question:

4.751, 4.373, 4.177, 4.676, 4.425, 4.228, 4.125, 4.251, 3.951, 4.192, 4.291, 4.414

Formula:

$\text{Standard Deviation} = \sqrt{\displaystyle\frac{\sum (x_i -\bar{x})^2}{n-1}}$

where $x_i$ are data points, $\bar{x}$ is the mean and n is the number of observations.

$Mean = \displaystyle\frac{\text{Sum of all observations}}{\text{Total number of observation}}$

$Mean =\displaystyle\frac{51.854}{12} = 4.321$

Sum of squares of differences = 0.5602

$s = \sqrt{\dfrac{0.5602}{11}} = 0.226$

98% Confidence interval:

$\bar{x} \pm t_{critical}\displaystyle\frac{s}{\sqrt{n}}$

Putting the values, we get,

$t_{critical}\text{ at degree of freedom 11 and}~\alpha_{0.02} = \pm 2.718$

$4.321 \pm 2.718(\frac{0.226}{\sqrt{12}} ) = 4.321 \pm 0.1773 = (4.144 ,4.498)$

3 0

4 years ago

Read 2 more answers

Welder A charges $300 for every 4 of of labor. Welder B charges $240 for every 3 hours of labor. Which welder offers a better de

Nastasia [14]

Answer:

Welder A has a better deal because for each hour welder A would charger $75 while welder B would charge $80

Welder A:

300/4 = $75

Welder B:

240/3 = $80

5 0

3 years ago

Read 2 more answers

The angles of elevation to an airplane are being conti'nuously

sasho [114]

Angles of Elevation and Depression. The angle of elevation of an object as seen by an observer is the angle between the horizontal and the line from the object to the observer's eye (the line of sight).

7 0

4 years ago

The GCF of 18 and 27 is

vovangra [49]

Answer:

The answer is 9.

Step-by-step explanation:

GCF means that Greatest Common Factor. They both have 9 in common as a factor and its the biggest number they share, which is why 9 is the answer.

6 0

4 years ago

Read 2 more answers