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vfiekz [6]
3 years ago
8

Helpppppp mmmeeeee please need fast

Mathematics
1 answer:
Diano4ka-milaya [45]3 years ago
3 0

Answer:

9/5

Step-by-step explanation:

The scale factor is what do we multiply A by to get B

Take the ratio of B/A

18/10

9/5

The scale factor is 9/5

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1 foot and 6 inches

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Explain why multiplying a fraction by 5/6 results in a value that is less than the original fraction
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Answer:

Step-by-step explanation:

(5/6) itself is less than 1 (but greater than 0).  Thus, anything multiplied by (5/6) will result in a smaller-by-magnitude quantity.

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3 years ago
to estimate the height of the jin mao tower in shanghai , a tourist sights the top of the tower form a mirror that is 86.7 meter
Ray Of Light [21]

Answer:

The height of the tower = 420.48 meters

Step-by-step explanation:

For better understanding of the solution, see the figure attached below :

Let the height of the tower be x meters

Now, using the laws of reflection : angle of reflection = angle of incidence

Also, both the tower and the tourist are standing parallel to each other

⇒ ∠A = ∠i ( Alternate interior angles are equal)

Similarly, ∠D = ∠r ( Alternate interior angles)

But, ∠i = ∠r

⇒ ∠A = ∠D

Also, the tourist and the tower is perpendicular to the ground surface.

⇒ m∠B = m∠E = 90°

Now, in ΔABC and ΔDEC

∠A = ∠D (Proved above)

m∠B = m∠E = 90°

So, by AA postulate of similarity of triangles, ΔABC ~ ΔDEC

As the sides of similar triangles are proportional to each other

\frac{AB}{DE}=\frac{BC}{EC}\\\\\implies\frac{1.92}{x}=\frac{0.4}{87.6}\\\\\implies x=\frac{87.6\times 1.92}{0.4}\\\\\bf\implies x = 420.48\textbf{ meters}

Hence, The height of the tower = 420.48 meters

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3 years ago
Zane asks 50 random people in a town of 1,500 whether or not they are registered to vote. 44 out of the 50 are registered. Based
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Answer:

1320

Step-by-step explanation:

i am

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