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sladkih [1.3K]
3 years ago
9

The sector of a circle with a 12-inch radius has a central angle measure of 60°.

Mathematics
2 answers:
oksian1 [2.3K]3 years ago
8 0

Answer: Area of sector in term of π is 24 in.².

Step-by-step explanation:

Since we have given that

Radius of the sector of a circle = 12 inch

Central angle = 60°

As we know the formula for "Area of sector":

Area=\frac{\theta}{360^\circ}\pi r^2\\\\Area=\frac{60}{360}\times \pi\times 12\times 12\\\\Area=24\pi\ inch^2

Hence, Area of sector in term of π is 24 in.².

dolphi86 [110]3 years ago
4 0

Answer:

The exact area of the sector in terms of ​π is 24\pi \thinspace inches^2

Step-by-step explanation:

Given the radius of circle 12-inch and the central angle measure of 60°.

We have to find the the exact area of the sector in terms of ​ π.

As the area of sector can be calculated by the formula

A=\frac{\theta}{360^{\circ}}\times\pi r^2

where \theta is the central angle in degree and r is the radius of circle.

Now, A=\frac{60}{360^{\circ}}\times\pi (12)^2

              =\frac{1}{6}\times\pi (12)^2

              =24\pi \thinspace inches^2

Hence, the exact area of the sector in terms of ​π is 24\pi \thinspace inches^2

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Step-by-step explanation:

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Please Help me, Asap, want to get as ahead as possible in math before school starts.
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The measure of angle ABD (m∠ABD) is 104°

<h3>Calculating the measure of angles </h3>

From the question, we are to determine the measure of angle ABD

In the diagram,

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m∠ABC = m∠ABD + m∠DBC

From the given information,

m∠ABC = 140°

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2 years ago
A luxury hotel group purchases a deserted island 3. 5 miles offshore and due south of an endangered bird nesting beach. The near
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Answer:

T.C ( 1.1007 ) = T.C_min = $2252  

Step-by-step explanation:

Given:

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- Cost of electricity construction over ground C_w = $150 / mile

- The distance from hotel island = 3.5 miles

- The distance from beach to power source = 10 miles

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Find the least expensive price for which you can bill the job

Solution:

- This problem requires cost optimization. So we need to develop a cost function as follows

Total Cost = C_w*(distance from island to x) + C_g*( distance from x to power)

- Now calculate the relevant distances using Pythagoras theorem:

              Distance from island to x = sqrt ( x^2 + 3.5^2 )

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- Input the distances in the cost function:

              T.C ( x ) = C_w*sqrt ( x^2 + 3.5^2 ) + C_g*(10 - x )

- Input the relevant rates:

              T.C ( x ) = 250*sqrt ( x^2 + 3.5^2 ) + 150*(10 - x )  

- Simplify:

              T.C ( x ) = 250*sqrt ( x^2 + 12.25 ) + 1500 - 150x

- Next, we will optimize the cost to minimum. We need the distance x that would give us the minimum cost. To minimize the function, set its derivative with respect to x equals to zero.

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Simplify and solve:

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- The cost function is minimized at x = 1.1007 miles. We will input this back into our function and evaluate the minimum cost as follows:

                 T.C ( 1.1007 ) = 250*sqrt ( 1.1007^2 + 12.25 ) + 1500 - 150*1.1007

                 T.C ( 1.1007 ) = T.C_min = $2252  

                                 

- So the minimum cost associated with this plan is $2252.

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3 years ago
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