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3 years ago

What percent of $81 equals $81

Mathematics

1 answer:

Sophie [7]3 years ago

8 0

Answer:

Hi, There! There Are Multiple Ways to Go About this So..

81/100 = 81%

But The True Answer Is 100%

Step-by-step explanation:

Have a great day!

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6. A sector of a circle is a region bound by an arc and the two radii that share the arc's endpoints. Suppose you have a dartboa

Aliun [14]

Given the dartboard of diameter $20in$ , divided into 20 congruent sectors,

The central angle is $18^\circ$

The fraction of a circle taken up by one sector is $\frac{1}{20}$

The area of one sector is $15.7in^2$ to the nearest tenth

The area of a circle is given by the formula

$A=\pi r^2$

A sector of a circle is a fraction of a circle. The fraction is given by $\frac{\theta}{360^\circ}$ . Where $\theta$ is the angle subtended by the sector at the center of the circle.

The formula for computing the area of a sector, given the angle at the center is

$A_s=\dfrac{\theta}{360^\circ}\times \pi r^2$

<h3>Given information</h3>

We given a circle (the dartboard) with diameter of $20in$ , divided into 20 equal(or, congruent) sectors

<h3>Part I: Finding the central angle</h3>

To find the central angle, divide $360^\circ$ by the number of sectors. Let $\alpha$ denote the central angle, then

$\alpha=\dfrac{360^\circ}{20}\\\\\alpha=18^\circ$

<h3>Part II: Find the fraction of the circle that one sector takes</h3>

The fraction of the circle that one sector takes up is found by dividing the angle a sector takes up by $360^\circ$ . The angle has already been computed in Part I (the central angle, $\alpha$ ). The fraction is

$f=\dfrac{\alpha}{360^\circ}\\\\f=\dfrac{18^\circ}{360^\circ}=\dfrac{1}{20}$

<h3>Part III: Find the area of one sector to the nearest tenth</h3>

The area of one sector can be gotten by multiplying the fraction gotten from Part II, with the area formula. That is

$A_s=f\times \pi r^2\\=\dfrac{1}{20}\times3.14\times\left(\dfrac{20}{2}\right)^2\\\\=\dfrac{1}{20}\times3.14\times10^2=15.7in^2$

Learn more about sectors of a circle brainly.com/question/3432053

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2 years ago

Cuantos millones de libras en materiales se generan en mexico

DaniilM [7]

Answer:

english

Step-by-step explanation: please

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3 years ago

A football marked $40 is on sale at a discount rate of 10%. What is the sale price

Anna11 [10]

Answer:

$36

Step-by-step explanation:

$40 X90/100= 36

7 0

3 years ago

Use a(t) = −9.8 meters per second per second as the acceleration due to gravity. (Neglect air resistance.) A canyon is 2100 mete

Umnica [9.8K]

Answer:

$t \approx 20.7\,s$

Step-by-step explanation:

Given that rock experiments a constant acceleration, position function can be obtained by integrating twice:

$v(t) = v_{o} - a\cdot t$

$s(t) = s_{o} + v_{o}\cdot t -\frac{a}{2}\cdot t^{2}$

The initial conditions of the rock are, respectively:

$s_{o} = 2100\,m$

$v_{o} = 0\,\frac{m}{s}$

Position of the rock as a function of time is:

$s(t) = 2100\,m -(4.9\,\frac{m}{s^{2}})\cdot t^{2}$

The time taken for the rock to hit the canyon floor is:

$0\,m = 2100\,m - (4.9\,\frac{m}{s^{2}} )\cdot t^{2}$

$2100\,m = (4.9\,\frac{m}{s^{2}} )\cdot t^{2}$

$t = \sqrt{\frac{2100\,m}{4.9\,\frac{m}{s^{2}} } }$

$t \approx 20.7\,s$

8 0

3 years ago

Collins is making a bulletin board and note center.He is using square cork tiles and square dry erase tile. One of every 3 squar

o-na [289]

Hey there!
If we have 12 squares and one of every 3 is a cork square, that means that 1/3 of the squares are cork. Using our keyword "of" meaning multiplication, we have:
1/3 * 12 = 12/3 = 4 cork squares
Hope this helps!

5 0

3 years ago

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