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3 years ago

The area of a square garden is 1 / 81 km^2. How long is each side?

1 answer:

7 0

Km^2 = 1,000,000 meters
1,000,000 meters divided by 81 is 12345.679
the square root of 12345.679 square meters is 111.111
111.111 meters is a single side of the garden.

111.111^2 = 12345.654
12345.654 * 81 = 999,997.974

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What is the vertex of the graph of f(x) = x2 + 10x - 9? A) (-5, -34) B) (-5, -9) C) (5, -9) D) (5, 66)

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Answer:

A) (-5, -34)

Step-by-step explanation:

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Take the coefficient of the x term and divide by 2 then square it. We add it and then subtract it not to change the value of the equation

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3 years ago

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A man is standing at a radar base and observes an unidentified plane at an altitude 6000m flying towards the radar base at an an

liubo4ka [24]

Answer:

The speed in of the plane is 115.47 m/sec

Step-by-step explanation:

Given:

Height at which the plane is flying = 6000 m

Angle of elevation at the radar base = 30 Degrees

Angle of elevation at the radar base after one minute = 60 Degrees

To Find:

The Speed of the plane in meter per second = ?

Solution:

Let us use the tangent of the angle to find the distance (d) to a point directly below plane:

when the angle is 30 degrees

$tan(30) = \frac{6000}{d1}$

$d1 = \frac{6000}{tan(30)}$

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$tan(60) = \frac{6000}{d2}$

$d2 = \frac{6000}{tan(60)}$

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=>d1 - d2

=>0392.3 - 3464.1

= 6928.2 m/min

Now converting to m/sec

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The area of a square garden is 1 / 81 km^2. How long is each​ side?

The area of a square garden is 1 / 81 km^2. How long is each side?