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Lilit [14]
3 years ago
9

Pls help I don't understand this

Mathematics
1 answer:
Rudiy273 years ago
4 0
<h3>Answer:</h3>

<u>By angle bisector property</u>,

  • 11x + 23 = 8x + 35
  • 11x - 8x = 35 - 23
  • 3x = 12
  • x = 4°

So, <u>m∠ABD</u> = 8x + 35

  • 8 × 4 + 35
  • 32 + 35 = 67°

<u>m∠CBD</u> = 11x + 23

  • 11 × 4 + 23
  • 44 + 23 = 67°

<u>m∠ABC</u> = 67° + 67° = 134°

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Answer:

Step-by-step explanation:

Let x be the random variable representing the times a fire department takes to arrive at the scene of an emergency. Since the population mean and population standard deviation are known, we would apply the formula,

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Where

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From the information given,

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the probability that fire department arrives at the scene in case of an emergency between 4 minutes and 8 minutes is expressed as

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For x = 4,

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The percent of emergencies that the fire department arrive at the scene in between 4 minutes and 8 minutes is

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