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julsineya [31]
3 years ago
9

Please help, this is geometry

Mathematics
1 answer:
SSSSS [86.1K]3 years ago
3 0

Answer:

Step-by-step explanation:

r = 3

angle = 50

Formula: Length = (angle/360) * 2 pi * r

Length = (50/360) * 2 * 3.14 * 3

Length = 0.13889 * 2 * 3.14 * 3

Length = 0.13899 * 6 * 3.14

Length = 2.6167

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How many moles of oxygen are required to burn 3.0 mole of C10H8 (naphthalene)?
astra-53 [7]

Answer: 36 moles oxygen

Step-by-step explanation:

C10H8 + 12O2 ====》 10CO2 + 4H2O

From the equation of the reaction,

1 mole of napth requires 12 moles of O2

3 moles of napth would require x moles O2

X = (3 * 12) / 1

X = 36 moles of oxygen.

Therefore 3 moles of naphtalene (C10H8) would require 36 moles of oxygen

6 0
3 years ago
Im confused <br><br><br> khan academy 8th grade
Anit [1.1K]

Answer:

14

Step-by-step explanation:

hi! so the question is asking what h is when you input -18 for x, right?

inputing in this question means to substitute, meaning that in this equation, -18 will take the place of x!

  • let's see what the equation looks like now
  • h = 17 + \frac{-18}{6}
  • easy as that!

now let's do the math :)

  • because of PEMDAS, remember to do the fraction (dividing) first!
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we can change that to --> h = 17 - 3

h = 14

let me know if you're still confused!

7 0
2 years ago
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Solve 40=4y.<br><br> the solution is y=??
Tanzania [10]

Answer:

y = 10

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