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steposvetlana [31]
3 years ago
12

-9n>-36? Solve and graph

Mathematics
1 answer:
wlad13 [49]3 years ago
6 0
-9n>-36
divide both sides by -9
n<4 

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How tall is a building that casts a ​78-ft shadow when the angle of elevation of the sun is 30 degrees​?
Marta_Voda [28]

Answer: 45.03\ ft

Step-by-step explanation:

Given

The length of the shadow is 78 ft

the angle of elevation is \theta =30^{\circ}

Suppose the height of the building is h

From the figure, we can write

\tan 30^{\circ}=\dfrac{h}{78}\\\\h=78\tan 30^{\circ}\\\\h=45.03\ ft

The height of the building is 45.03 ft

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2 years ago
A 12 foot ladder is leaning up against a wall. If the angel made between the ladder and the ground is 80 degrees. How far up can
lorasvet [3.4K]

Answer:

<h3>11.8 feet</h3>

Step-by-step explanation:

Given

Length of the ladder = 12foot

angle of elevation = 80 degrees

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Height of the wall (opposite side)

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height of the wall is opposite;

Using SOH, CAH, TOA trig identity

According to SOH

sin 80 = opp/hyp

sin80 = opp/12

opp = 12sin80

opp = 11.82 feet

Hence the height of the wall is 11.8feet (to the nearest tenth)

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3 years ago
IM GIVING 20 POINTS. Help me with this please. it would be very helpful.
Talja [164]

<em>Solu</em><em>tion</em><em>:</em>

<em>hypotenuse</em><em>=</em><em>p</em>

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<em>base</em><em>=</em><em>n</em>

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<em>h^</em><em>2</em><em>=</em><em>p^</em><em>2</em><em>+</em><em>b</em><em>^</em><em>2</em>

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<em>Right</em><em> </em><em>ans</em><em>wer</em><em> </em><em>is</em><em> </em><em>of</em><em> </em><em>option</em><em> </em><em>A</em><em>.</em>

<em>Hope</em><em> </em><em>it</em><em> </em><em>helps</em><em>.</em><em>.</em><em>.</em><em>.</em>

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Need help on this for brainliest
Arisa [49]

Answer:

Your answer is letter d

Step-by-step explanation:

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Elaine has a piece of wire that is 2.16 m long. John has a piece of wire that is 2.061 m long. Who is piece of wire is longer? H
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Elaine's would be because.16 is closer to being a whole than .016
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