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Mekhanik [1.2K]
3 years ago
11

An observer is located at 900 feet from a building. The oberver notices a helicopter flying at a 49° angle of elevation from his

line of sight. How high is the helicopter flying over the building
Mathematics
1 answer:
klio [65]3 years ago
5 0

tan(49)=h/900 or h = 900 x tan(49)

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The figure shown in the right is made up of a square and a circle. Find the perimeter of the shaded region.
Tasya [4]

Answer:

B. 12 + 2pi cm

Step-by-step explanation:

The shaded region is made up of 3 square sides and one half circle. The three square sides are each 4, which means that those altogether equal 12.

The circle's circumference can be found by using the equation c = (d)pi

The diameter is 4, so the whole circumference is 4pi. However, you only need half of a circle, which is represented by 2pi.

Add them all together, and you get 12 + 2pi cm.

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Check the picture below.

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3 years ago
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5 0
3 years ago
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Answer: D (x-5, y+8) → D'
6 0
3 years ago
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