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sertanlavr [38]
3 years ago
5

Are these all correct ? If not please let me know

Mathematics
2 answers:
Licemer1 [7]3 years ago
8 0
They are all correct except in 5), 4+8 is 12, not 13.
Ulleksa [173]3 years ago
3 0
First set on number two, second set on number five (these are wrong)
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In order to safely land, the angle that a plane approaches the runway should be no more than 15°. A plane is approaching Ottawa
belka [17]

9514 1404 393

Answer:

  9.5°, yes

Step-by-step explanation:

The relevant trig relation is ...

  Tan = Opposite/Adjacent

The distance opposite the angle of elevation is the plane's height, 500 m. The distance adjacent to the angle of elevation is the horizontal distance to the plane, 3 km = 3000 m. Then the angle is found from ...

  tan(α) = 500/3000 = 1/6

  α = arctan(1/6) ≈ 9.46°

The plane is approaching at an angle of 9.46°. It is safe to land, since that angle is less than 15°.

_____

<em>Additional comment</em>

The usual descent angle for most commercial air traffic is 3°. Some airport geography demands it be different (steeper). A higher descent angle can put undue stress on the landing gear.

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3 years ago
What is the common ratio for the sequence:<br> 28, 14, 7, 3.5...
SCORPION-xisa [38]

Answer:

r = \frac{1}{2}

Step-by-step explanation:

The common ratio r is calculated as

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7 0
2 years ago
Read 2 more answers
Choosing an odd number. 1-12. Put it in a fraction
xxMikexx [17]
2/6 is a fraction. the denominator has to be an even number.
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three bells ring at the intervals of 10 minutes and 20 minutes if they all ring together at 10 clock when will they ring togethe
mario62 [17]

Answer:The LCM of 10, 15, and 20 is 60. After 60 minutes, they ring together again.

Step-by-step explanation:

6 0
2 years ago
Radical-3 -radical -169
ddd [48]
√3 - √169 =?

√3 - √(13)²  = √³ - 13  or equal √3 + 13 since √169 = + or - 13

3 0
3 years ago
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