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3 years ago

9

If we suppose that the volume of Lake Rason is approximately 2.56 x 10^5 km^3 and Lake Rason is 20 times the volume of Lake Rush

y, write the volume of Lake Rushy (approximately).

1 answer:

AlekseyPX3 years ago

4 0

Answer:

1.5 x 10 with the exponent of 7

Step-by-step explanation:

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torisob [31]

Answer:

$h = 15.163\ meters$

Step-by-step explanation:

(Assuming the correct angles are 30° and 45°)

We can use the tangent relation of the angle of elevation to find two equations, then we can use these equations to find the height of the pole.

Let's call the initial distance of the boy to the pole 'x'.

Then, with an angle of elevation of 30°, the opposite side to this angle is the height of the pole (let's call this 'h') minus the height of the boy, and the adjacent side to the angle is the distance x:

$tan(30) = (h - 1.5) / x$

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$tan(45) = (h - 1.5) / (x - 10)$

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$0.5774 = (h - 1.5) / x$

$1 = (h - 1.5) / (x - 10) \rightarrow (h - 1.5) = (x - 10)$

From the first equation, we have that:

$x = (h - 1.5) / 0.5774$

Using this value of x in the second equation, we have that:

$h - 1.5 = \frac{ (h - 1.5) }{0.5774} - 10$

$h + 8.5 = \frac{ (h - 1.5) }{0.5774}$

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