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3 years ago

What is 125% of 12.8

Mathematics

2 answers:

Zigmanuir [339]3 years ago

6 0

That would be (125 * 12.8) / 100

= (5 * 12.8) / 4

= 64/4

= 16 answer

Vlad1618 [11]3 years ago

5 0

Well, 125% of 12.8 would be higher than the original number, or 100%. Therefore you would multiply 12.8 by 125, which gives you 1600. Then divide 1600 by 100, which gives you the final answer: 16

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3 years ago

Find the approximate length of EF.

Yuri [45]

Answer:

The correct option is B

Step-by-step explanation:

Given information: ∠F=32°,∠D=54° and DF=18m.

According to the angle sum property of triangle, the sum interior angles of a triangle is 180°.

Using angle sum property, we get

$\angle D+\angle E+\angle F=180^{\circ}$

$54^{\circ}+\angle E+32^{\circ}=180^{\circ}$

$\angle E+86^{\circ}=180^{\circ}$

$\angle E=180^{\circ}-86^{\circ}$

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Law of sine:

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Using law of sine we get

$\frac{\sin D}{d}=\frac{\sin E}{e}$

$\frac{\sin D}{EF}=\frac{\sin E}{DF}$

$\frac{\sin 54^{\circ}}{EF}=\frac{\sin 94^{\circ}}{18}$

$\frac{0.809016994375}{EF}=\frac{0.99756405026}{18}$

Cross multiply,

$0.809016994375\times 18=0.99756405026\times EF$

Divide both sides by 0.99756405026.

$EF=14.5978655656$

$EF\approx 14.6$

The value of EF is 14.6 m. Therefore the correct option is B.

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