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Dominik [7]
4 years ago
14

An observer spots a plane flying at a 42 degree angle to his horizontal line of sight. If the plane is flying at an altitude of

15,000 ft, what is the distance (x) from the plane (P) to the observer (O)

Mathematics
1 answer:
Natalija [7]4 years ago
6 0

check the picture below.

make sure your calculator is in Degree mode.

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The cost C (in dollars) of building a house is related to the number k of carpenters used and the number e of electricians used
riadik2000 [5.3K]
C = 15000 + 50k^2 + 60e^2 \Rightarrow \\
\frac{dC}{de} = \frac{d}{de} 50k^2  + \frac{d}{de} 60e^2 \Rightarrow \\
\frac{dC}{de} =  100k\frac{dk}{de}  +  120e\\
Cost\ of\ house\ is\ fixed\ so\ \frac{dC}{de} = 0 \\
0 = 100k\frac{dk}{de}  +  120e\ \Rightarrow\ -120e = 100k\frac{dk}{de}  \ \Righarrow \\ \frac{dk}{de} = -\frac{6e}{5k}  \\



find k when e = 15

100000 = 15000 + 50k^2 + 60(15)^2 \Rightarrow k = \sqrt{1430}

\frac{dk}{de} = -\frac{6e}{5k} = -\frac{6(15)}{5\sqrt{1430}} = -0.476

inst rate of carpenters with 15 <span>electricians:</span> decreasing at 0.476 carpenters per electrician

7 0
3 years ago
Can someone show and explain the steps to these problems?
AveGali [126]

Answer:

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Step-by-step explanation:

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4 0
4 years ago
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X^3-3x^2+2x-6=0 find all solutions
ohaa [14]

Answer: x = -3, x=+/2=1.4142

7 0
3 years ago
What is value of 3-6(z-2)^3 if z= -2
lara [203]

Answer:

387.

Step-by-step explanation:

Given : 3-6(z-2)³.

To find : What is value if z = -2.

Solution : We have given

3-6(z-2)³.

Plugging the z = -2

3 - 6( -2- 2)³.

3 - 6( -4)³.

3 - 6 ( -64).

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387

Therefore, 387.

8 0
3 years ago
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If the line AD is a tangent to circle B, what is the measure of BCA?
dezoksy [38]
90°

Cuz,
Perpendicular dropped on the point when a tangent touches a circle from its centre make an angle of 90°
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4 years ago
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