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Anastaziya [24]
3 years ago
10

Kim drew the diagram below to find x, the length of the pole holding up the stop sign that is at an angle with the ground as sho

wn.
Mathematics
1 answer:
Nadya [2.5K]3 years ago
7 0

Answer:

the length of the pole is 9.90 feet.

Step-by-step explanation:

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Find the cube roots of 125(cos 288° + i sin 288°)
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Let r(cos O + i sin O)  be a cube root of 125(cos 288 + i sin 288)
then
r^3(cos O + i sin O)^3  =  125(cos 288 + i sin 28)

so r^3 = 125  and  cos 3O + i sin 3O  =  cos 288 + i sin 288

so r  = 5  and 3O = 288 + 360p and O = 96 +  120p

so one cube root is   5 (cos 96 + i sin 96)

Im a little rusty at this stuff Its been a long time.

Im not sure of the other 2 roots

sorry cant help you any more


3 0
3 years ago
Read 2 more answers
A.Draw parallel lines AB and CD.
ddd [48]

Answer:

Lines stay parallel or overlap

Step-by-step explanation:

AB and CD are parallel lines

Rotation around a point 90 degrees clockwise will make these lines perpendicular to their initial position but AB and CD will still be parallel to each other

They will overlap if the distance between them and point E is equal

Their initial slope is same and equal to m

Their final slope will be -1/m as a result of 90 degrees rotation

5 0
3 years ago
A new photocopier works 4 times as fast as an old one. When the machines work together, a university can produce all its staff m
Usimov [2.4K]

The old photocopier can make x manuals in an hour. The new photocopier can make 4x. Combined, they made 5x manuals in an hour.

In one hour they can make 1/28 of the manuals.

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The new photocopier can make all the manuals in 4/140 or 35 hours.

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6 0
3 years ago
The surface area of the three-dimensional figure is square centimeters?
Zina [86]

Answer:

Step-by-step explanation:

Alright, lets get started.

The surface area of the figure given is : The area of all shapes together

The figure has 2 similar triangles and 3 similar rectangles.

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The area of 1 triangle = \frac{1}{2}*10*8.66=43.3

So, the area of both triangles = 43.3*2=86.6

The area of 1 rectangle = width *length

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So, the area of all 3 rectangles = 3*150=450

So, total area of figure = 86.6+450=536.6

hence the surface area is 536.6 square centimeters : Answer

Hope it will help :)

3 0
3 years ago
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Answer:

A.

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