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Alona [7]
3 years ago
6

Find the perimeter of this sector. Give your answer in terms of

tle="\pi" alt="\pi" align="absmiddle" class="latex-formula">

Mathematics
1 answer:
JulsSmile [24]3 years ago
3 0

Answer:

Perimeter = 24 +  8π /3 m.

Step-by-step explanation:

Arc length = rC  where r = radius and C = angle in radians.

40 degrees = 40 π / 180

= 2π /9 radians.

Arc length = 12 * 2π /9

= 8π /3 m.

Perimeter of the sector = 2*12 + 8π /3

= 24 +  8π /3 m.

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If the area of the region bounded by the curve y^2 =4ax and the line x= 4a is 256/3 Sq units, using integration find the value o
almond37 [142]

If the area of the region bounded by the curve y^2 =4ax  and the line x= 4a  is \frac{256}{3} Sq units, then the value of  a will be 2 .

<h3>What is area of the region bounded by the curve ?</h3>

An area bounded by two curves is the area under the smaller curve subtracted from the area under the larger curve. This will get you the difference, or the area between the two curves.

Area bounded by the curve  =\int\limits^a_b {x} \, dx

We have,

y^2 =4ax  

⇒ y=\sqrt{4ax}

x= 4a,

Area of the region  =\frac{256}{3}  Sq units

Now comparing both given equation to get the intersection between points;

y^2=16a^2

y=4a

So,

Area bounded by the curve  =   \[ \int_{0}^{4a} y \,dx \] ​

 \frac{256}{3} =\[  \int_{0}^{4a} \sqrt{4ax}  \,dx \]

\frac{256}{3}=   \[\sqrt{4a}  \int_{0}^{4a} \sqrt{x}  \,dx \]

 \frac{256}{3}=   \[2\sqrt{a}  \int_{0}^{4a} x^{\frac{1}{2} }   \,dx \]                                            

\frac{256}{3}= 2\sqrt{a}  \left[\begin{array}{ccc}\frac{(x)^{\frac{1}{2}+1 } }{\frac{1}{2}+1 }\end{array}\right] _{0}^{4a}

\frac{256}{3}= 2\sqrt{a}  \left[\begin{array}{ccc}\frac{(x)^{\frac{3}{2} } }{\frac{3}{2} }\end{array}\right] _{0}^{4a}

\frac{256}{3}= 2\sqrt{a} *\frac{2}{3}  \left[\begin{array}{ccc}(x)^{\frac{3}{2}\end{array}\right] _{0}^{4a}

On applying the limits we get;

\frac{256}{3}= \frac{4}{3} \sqrt{a}   \left[\begin{array}{ccc}(4a)^{\frac{3}{2}  \end{array}\right]

\frac{256}{3}= \frac{4}{3} \sqrt{a} *\sqrt{(4a)^{3} }

\frac{256}{3}= \frac{4}{3} \sqrt{a} *  8 *a^{2}   \sqrt{a}

\frac{256}{3}= \frac{4}{3} *  8 *a^{3}

⇒ a^{3} =8

a=2

Hence, we can say that if the area of the region bounded by the curve y^2 =4ax  and the line x= 4a  is \frac{256}{3} Sq units, then the value of  a will be 2 .

To know more about Area bounded by the curve click here

brainly.com/question/13252576

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8 0
2 years ago
Read 2 more answers
When a group of colleagues discussed where their annual retreat should take​ place, they found that of all the​ colleagues: 12 w
Evgen [1.6K]
Given that 4 people would not <span>go to a park or a beach or a​ cottage.

Number of people that will </span><span>go to neither a park nor a​ cottage but will go to a beach = 5 - 4 = 1.

</span><span>Number of people that will <span>go to neither a beach nor a​ cottage but will go to a park = 9 - 4 = 5
</span></span>
<span>Number of people that will <span>go to neither a park nor a​ beach but will go to a cottage = 8 - 4 = 4

</span></span>
Number of people that will not go to a​ cottage but will go to a beach or a park = 12 - 5 - 1 = 6

Number of people that will not go to a​ beach but will go to a cottage or a park = 10 - 5 - 4 = 1

Number of people that will not go to a​ park but will go to a beach or a cottage = 12 - 4 - 1 = 7

Number of people <span>willing to go to all three places = 5

Therefore, total number of colleagues = 4 + 1 + 5 + 4 + 6 + 1 + 7 + 5 = 33
</span>
8 0
3 years ago
What is the average acceleration during the time interval 0 seconds to 10 seconds?
arsen [322]

Answer:

ok so what you should do is take your fingers to google

Step-by-step explanation:

8 0
3 years ago
A group of friends buys 15 movie tickets for a total of $147.66, which
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Answer: $9.20

Step-by-step explanation:

Divide the full tax price by the sales tax (7% or .07) plus 1 (always add 1 to the tax) thus

$147.66 / 1.07 = $138.00

So $138.00 is the full price without tax.

Now divide $138.00 by the amount of tickets (15) to find a single ticket price before tax!

138.00/15 = $9.20

Remember to always add 1 to the tax percentage above when dividing to get the *pre-tax* price.

7 0
3 years ago
What is the domain and range of the set of order pairs? (7,3),(-2,-2),(4,1),(-9,0),(0,7)
erastovalidia [21]

Answer:

Domain {7,-2,4,-9,0} Range {3,-2,1,0,7}

Step-by-step explanation:

Just remember that domain is the x values and the range is the y values.

5 0
3 years ago
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