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Scorpion4ik [409]
4 years ago
10

Find the surface area of the closed hemisphere

Mathematics
2 answers:
V125BC [204]4 years ago
8 0
Diameter = 8 yards so the Radius = 4 yards:

 Area of a sphere = 4π.R² and hemisphere = 2π.R²

Area of hemisphere = 2.π.(4)² = 32.π
But note we didn't calculate yet the are that closes this hemisphere:
Area of the cicle = π.R² = π.(4)² = 16.π, so the surface area of the hemisphere is 32π + 16π = 48.π (Or =150.8 yard²)
lina2011 [118]4 years ago
3 0
Its about 100.530964915.
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A triangle has side of lengths 27,79,84 is it a right triangle
MrRissso [65]
Lets find out...
a^2 + b^2 = c^2
27^2 + 79^2 = 84^2
729 + 6241 = 7056
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4 0
3 years ago
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prem gave 1/3 of his property for charity of the rest he gave 2/3 to his wife and rest divided equally between his son and daugh
Anna11 [10]

Given parameters:

Fraction given to charity = \frac{1}{3}

Fraction given to wife = \frac{2}{3}

Unknown:

Fraction given to son and daughter =?

Solution:

Let the total property  = x

    Fraction given to charity  = \frac{1}{3} x

    Fraction given to wife  = \frac{2}{3} x

The remaining was given to son and daughter = F

    So;

     Total property  = fraction given to charity + fraction given to wife + fraction given to son and daughter

         x  = \frac{1}{3} x + \frac{2}{3} x + F

            F = x - (\frac{1}{3} x + \frac{2}{3} x)

            F = 0

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8 0
3 years ago
Find the magnitude of the vector (4,9).<br> Write your answer in simplified radical form.
jekas [21]

Step-by-step explanation:

4^2+9^2=97

Magnitude=sqrt(97)

4 0
3 years ago
What is an equation of the line that passes through the point ( − 5 , − 1 ) (−5,−1) and is parallel to the line 4 x − 5 y = 10 4
Ilia_Sergeevich [38]

Answer:

Step-by-step explanation:

The equation of a straight line is expressed in the slope intercept form as

y = mx + c

Where m represents the slope

c represents the intercept.

The given equation is

4x−5y = 10

5y = 4x - 10

y = 4x/5 - 2

Comparing with the slope intercept form,

The slope,m = 4/5

The line that is parallel to the given line passes through the point (- 5,- 1)

If two lines are parallel, it means that they have the same slope. Therefore, the slope of the line that is parallel to the given line is 4/5

To determine the intercept c, we will substitute m = 4/5, x = - 1 and x = - 5 into the slope intercept equation. It becomes

- 5 = 4/5 × - 1 + c

- 5 = - 4/5 + c

c = - 5 + 4/5 = (- 25 + 4)/5 = - 21/5

The equation becomes

y = 4x/5 - 21/5

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3 years ago
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Answer:

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