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spin [16.1K]
3 years ago
11

David is standing 500 feet away from the base of a cell phone tower. The angle of elevation from his eyes to the top of the towe

r is 78 degrees. If David’s eyes are 6 feet above the ground, how tall is the tower?
Mathematics
1 answer:
andrey2020 [161]3 years ago
4 0

Answer:

height of the tower = 2358.3 feet

Step-by-step explanation:

To solve this question, we can use the tangent relation of the angle of elevation, where the opposite side of the angle is the height of the tower minus six feet and the adjacent side of the angle is the distance from David to the tower. So, we have that:

tangent(78) = (height - 6)/500

4.7046 = (height - 6) / 500

height - 6 = 2352.3

height = 2358.3 feet

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Rom4ik [11]

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Step-by-step explanation:

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Now...

a + 90° + 50° = 180° ( the sum of interior angle of triangle is 180° )

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a = 180° - 140°

a = 40°

hence the value of a is 40°

7 0
2 years ago
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I NEED HELP ASAP PLEASEEEE​
spin [16.1K]

Answer:

Step-by-step explanation:

1) Find the Mean of all the numbers.

3+4+5+7+10+12+15=56

56/7=8 mean is 8

Now We Calculate Standard Deviation:

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You take each number from the problem i.e 3,4,5...

and then you subtract the mean from it and then square it.

S=\sqrt{(-5)^2+(-4)^2+(-3)^2+(-1)^2+(2)^2+(4)^2+(7)^2}

S=\sqrt{25+16+9+1+4+16+49}

S=\sqrt{120}

S=\sqrt{120}/7

7 is the amount of data units given in the problem.

120/7=17.1428571429

\sqrt{17.1428571429} =4.1403933560541

Nearest hundredth=4.14

5 0
3 years ago
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ruslelena [56]

Answer:

Yes table 1 is

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Step-by-step explanation:

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Sin²Ф= 16/25

take square root on both sides

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