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3 years ago

9

The last section is not correct the answer should be

1 answer:

Zigmanuir [339]3 years ago

4 0

2. 90 is 1/10 of what ? :
90 = 1/10x...multiply both sides by 10, this eliminates the 10 on the right
90 * 10 = x
900 = x <===
4. 5000 is 1/10 of what ? :
5000 = 1/10x ...multiply by 10
5000 * 10 = x
50,000 = x <===
8. 2000 : 10 times as much = 20,000 : 1/10 as much = 1/10(2000) = 200
9. 400 : 10 times as much = 4000 : 1/10 as much = 1/10(400) = 40
10. 60 : 10 times as much = 600 : 1/10 as much = 1/10(60) = 6
12. u got it correct..it is 30,000

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2 years ago

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2 years ago

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IRINA_888 [86]

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x = 14

Step-by-step explanation:

Given

- $\frac{1}{5}$ (x - 4) = - 2

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6 0

3 years ago

nikdorinn [45]

Answer:

$2.9 cm^2$

Step-by-step explanation:

Given,

Angle of sector = 30°

Radius of circle, r = 8 cm

Area of the shaded region, A =?

The diagram is attached below.

Now,

Area of shaded region = Area of sector - Area of triangle

Area of triangle = $\frac{1}{2}\times base \times height$

We know that,

$\sin \theta = \dfrac{P}{H}$

$\sin 30^\circ= \dfrac{P}{8}$

$P = \dfrac{8}{2}$

$P = 4\ cm$

And

$\cos \theta =\dfrac{B}{H}$

$\cos 30^\circ = \dfrac{B}{8}$

$B = \dfrac{8\times \sqrt{3}}{2}$

$B = 4\sqrt 3$

Area of sector = $\dfrac{\theta}{360^\circ}\times \pi r^2$

Area of sector = $\dfrac{30^\circ}{360^\circ}\times \pi \times 8^2$

= 16.75 cm^2

Area of triangle = $\dfrac{1}{2} \times 4\sqrt 3 \times 4$

= 13.85 cm^2

Area of shaded region = 16.75 - 13.85

= $2.9 cm^2$

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2 years ago