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Andre45 [30]
3 years ago
9

PROJECT MATH - ANGLE OF ELEVATION AND DEPRESSION

Mathematics
1 answer:
Sergio039 [100]3 years ago
6 0

Answer:

<u>Story</u>

Jane is 1.7 m tall.  She stands 250 m away from the base of the Eiffel tower and looks up at the top of the building.  The angle of elevation from her eyeline to the top of the building is 45°.

<u>Question</u>

Calculate an estimate of the height of the building. Give your answer to the nearest meter.

<u>Calculation</u>

Label the sides of the triangle O, A and H (where O is the side opposite to the angle, A is the side adjacent to the angle and H is the hypotenuse).

In the triangle, the angle and side A is known, and O must be calculated.

Therefore, use the trig ratio tan(x) = O/A:

⇒ tan(40) = O/250

⇒ 250tan(40) = O

⇒ O = 209.7749078...

Assume Jane's eye-level is approximately 1.5 m above the ground.

Therefore, the Eiffel tower is approximately:

209.7749078... + 1.5 = 211.2749078.. meters tall

Rounding to the nearest meter ⇒ 211 m

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C

Step-by-step explanation:

Since all triangles' angles have a sum of 180 degrees, it can't be A, because that would make it 240 degrees. That leaves us with B and C. While B <em>could</em> be true, we don't know it for sure. Therefore, C is the correct answer because adding them should equal 60 degrees, which, adding them to the first angle (which was 120 degrees), would 180 degrees.

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5 0
3 years ago
WILL GIVE THE BRAINLIEST! PLEASE HELP!
serious [3.7K]
Answer: 1,632.571428571429~ 1,633 people

By using the data of only 12 people out of 252 were blood type A, we can set up an equation to solve this question. Since we are trying to find x amount of people in this situation. We will write

12 x
——- = ———
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Cool! Let’s go, then let’s use the cross multiplication method, so 12•34284=411408
Then let’s do 252 times x which is just 252

Finally we get 411408/252 which gets approximately 1,633 people.

Hopefully this helped! Love youuuu
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