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Gnom [1K]
2 years ago
15

Please answer quickly!!!

Mathematics
2 answers:
dsp732 years ago
6 0

Answer:

Answer: 1 1/4c or 5/4c

Step-by-step explanation:

c is same thing as 1c

1c + 1/4c

(In simple words: Adding a whole to 1/4.)

1 + 1/4 = 1 1/4 or 5/4

same thing when having c:

1c + 1/4c = 1 1/4c or 5/4 c

e-lub [12.9K]2 years ago
5 0

Answer:

1 1/4c

Step-by-step explanation:

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Find the length of the missing side. The triangle is not drawn to scale.
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Answer:

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Step-by-step explanation:

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8 0
3 years ago
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A projectile is fired with muzzle speed 220 m/s and an angle of elevation 45° from a position 30 m above ground level. Where doe
Allushta [10]

Answer:

  • 4968.6 m from where it was fired
  • 221.33 m/s

Step-by-step explanation:

For the purpose of this problem, we assume ballistic motion over a stationary flat Earth under the influence of gravity, with no air resistance.

We can divide the motion into two components, one vertical and one horizontal. For muzzle speed s and launch angle θ, the horizontal speed is presumed constant at s·cos(θ). The initial vertical speed is then s·sin(θ) and the (x, y) coordinates as a function of time are ...

  (x, y) = (s·cos(θ)·t, -4.9t² +s·sin(θ)·t + h₀) . . . . . where h₀ is the initial height

To find the range, we can solve the equation y=0 for t, and use this value of t to find x.

Using the quadratic formula, we find t at the time of landing to be ...

  t = (-s·sin(θ) - √((s·sin(θ))²-4(-4.9)(h₀)))/(2(-4.9))

  t = (s/9.8)(sin(θ) +√(sin(θ)² +19.6h₀/s²))

For s = 220, θ = 45°, and h₀ = 30, the time of flight is ...

  t ≈ 31.939 seconds

Then the horizontal travel is

  x = 220·cos(45°)·31.939 ≈ 4968.6 . . . . meters

__

As it happens, the value under the radical in the above expression for time, when multiplied by s, is the vertical speed at landing. The horizontal speed remains s·cos(θ), so the resultant speed is the Pythagorean sum of these:

  landing speed = s·√(cos(θ)² +sin(θ)² +19.6h₀/s²) ≈ s√(1 +0.012149)

  ≈ 221.33 m/s

_____

Note that the landing speed represents the speed the projectile has as a consequence of the potential energy of its initial height being converted to kinetic energy that adds to the kinetic energy due to its initial muzzle velocity.

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Science notation is a good way to write what kinds of numbers? Select more then one answer
Marysya12 [62]
E:very large numbers

hope this helps, pal
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