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Eva8 [605]
3 years ago
6

Pls help I forgot how this works

Mathematics
1 answer:
Bond [772]3 years ago
6 0
This isn’t accurate because they didn’t round the numbers correctly. for example, if a decimal is 7.5, you would usually round it up to 8, so anything higher should also be rounded to 8. the fact they rounded 7.95 to 7 doesn’t make sense as it’s much closer to 8 than it is to 7.
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State whether the given measurements determine zero, one, or two triangles.
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3 years ago
Does anybody know the answer to these questions?
san4es73 [151]

Answer:

  1. 625,000 J

  2. 100 J

  4. 5 kg

  5. √5 ≈ 2.236 m/s

Step-by-step explanation:

You should be aware that the SI derived units of Joules are equivalent to kg·m²/s².

To reduce confusion between <em>m</em> for mass and m for meters, we'll use an <em>italic m</em> for mass.

In each case, the "find" variable is what's left after we put the numbers into the formula. It is what the question is asking for. The "given" values are the ones in the problem statement and are the values we put into the formula. The formula is the same in every case.

__

1. KE = (1/2)<em>m</em>v² = (1/2)(2000 kg)(25 m/s)² = 625,000 kg·m²/s² = 625,000 J

__

2. KE = (1/2)<em>m</em>v² = (1/2)(0.5 kg)(20 m/s)² = 100 kg·m²/s² = 100 J

__

4. KE = (1/2)<em>m</em>v²

  250 J = (1/2)<em>m</em>(10 m/s)² = 50 m²/s²

  (250 kg·m²/s²)/(50 m²/s²) = <em>m</em> = 5 kg

__

5. KE = (1/2)<em>m</em>v²

  2000 kg·m²/s² = (1/2)(800 kg)v²

  (2000 kg·m²/s²)/(400 kg) = v² = 5 m²/s²

  v = √5 m/s ≈ 2.236 m/s

7 0
3 years ago
pamela bought two caps at $9 each (c).she also bought two jean shirts that together cost her $70 (j). if she got a discount of $
enot [183]

Answer:

$71

Step-by-step explanation:

9 + 70 - 8 = 71

8 0
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