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Amanda [17]
3 years ago
8

Math help please.. number 13

Mathematics
1 answer:
Lerok [7]3 years ago
4 0
Use the Law of Cosines here with angle A as your reference angle.  It will be the one that the helicopter is at, the one we are looking for.  If that angle is angle A, then the side across from it is a, measure of 11.4.  Here's how the Law looks in our particular situation: (11.4) ^{2}=(7.4) ^{2}  +(8.5)^2-2(7.4)(8.5)cos(A).  Simplifying a bit we get 129.96 = 54.76 + 72.25 - 125.8cos(A) Combining like terms across the equals sign gives us 2.95 = -125.8 cosA.  Doing the division we get -.0234499205 = cosA.  Find the angle using the 2nd and cos buttons on your calculator.  It's 91.34°, rounded to just 91°.  Choice A
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Bad White [126]

Answer:

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A number,n, is at least -1.5
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Prime factorization of 50
prisoha [69]
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3 years ago
Dhaulagiri is the 7th highest mountain in the world. Ms. Fink is walking through
11111nata11111 [884]

Answer:

4833 m

Step-by-step explanation:

Given that her angle of elevation at the first recording is 47.3 at an altitude of 4900 m

We use Pythagoras Theorem to get this done

We can say that the opposite of the angle is the altitude, while the hypotenuse of the triangle, is the distance between herself and the top

Using the sine angle rule, we have

Sine 47.3 = 4900 / h

h = 4900 / sin 47.3

h = 4900 / 0.7349

h = 6668 m

This means that she was 6668 m away from the top of the mountain

She then moves 1000 m closer to the mountain top, this means that our h = 6668 - 1000

Using the same sine angle rule, we have

Sine 58.5 = o / 5668

o = 5668 * sine 58.5

o = 5668 * 0.8526

o = 4833 m

She is 4833 m above the sea level

5 0
3 years ago
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