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2 years ago

Can anyone help with 19-22 with work shown I’m really confused

Mathematics

1 answer:

yanalaym [24]2 years ago

8 0

Answer:

19. C

20. D

21. B

22. A

Step-by-step explanation:

If an angle is subtended from an arc and it goes to the opposite end of the circle, the angle is HALF of the measure of the arc. If it goes to the center, it is SAME measure as arc.

19.

Arc BC is DOUBLE of Angle BAC, so

78 * 2 = 156

Answer is C

20.

Arc BEC is DOUBLE of Angle BAC, so

114 * 2 = 228

Answer is D

21.

Angle ABC is HALF of Arc AC, so

Angle ABC = 110/2 = 55

Answer is B

22.

Angle ABC is HALF of Arc AC, so

Angle ABC = 218/2 = 109

Answer is A

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90,000

Step-by-step explanation:

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3 years ago

15 is what percent of 20

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100%/x%=20/15
(100/X)*x=20/15*x --I multiply both sides of the equation by X
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100/1.33333333333=x
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15 is 75% of 20

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3 years ago

Use cylindrical coordinates. find the volume of the solid that lies within both the cylinder x2 y2 = 9 and the sphere x2 y2 z2 =

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$\begin{cases}\mathbf x(r,\theta,\zeta)=r\cos\theta\\\mathbf y(r,\theta,\zeta)=r\sin\theta\\\mathbf z(r,\theta,\zeta)=\zeta\end{cases}$

we get a Jacobian determinant of $r$ , and the region is given in cylindrical coordinates by $0\le\theta\le2\pi$ , $0\le r\le3$ , and $-\sqrt{16-r^2}\le z\le\sqrt{16-r^2}$ .

The volume is then

$\displaystyle\int_{\theta=0}^{\theta=2\pi}\int_{r=0}^{r=3}\int_{z=-\sqrt{16-r^2}}^{z=\sqrt{16-r^2}}r\,\mathrm dz\,\mathrm dr\,\mathrm d\theta=\dfrac{4(64-7\sqrt7)\pi}3$

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2 years ago

A clown creates an equation that relates his data of each child´s head size to the length of the balloon he needs to make them a

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Answer:

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3 years ago

First, rewrite 14/25 and 11/20 so that they have a common denominator. Then, use <, =, >

muminat

Answer: 14/25 = 56/100

11/20 = 55/100

14/25 > 11/20

Step-by-step explanation:

The least common multiple of 20 and 25 is 100.

(100 = 20*5, 25*4)

So we can take the common denominator 100.

14*4/25*4 =56/100. ∴14/25 = 56/100

11*5/20*5 =55/100. ∴11/20 = 55/100

56>55

∴56/100 > 55/100

∴14/25 > 11/20

Hope it's good;)

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3 years ago