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Korolek [52]
3 years ago
11

The combined weight of the people in the elevator is 49% of the 3,025 pound capacity. Which would be The best way to estimate th

e combined weight in pounds of the people in elevator?
Mathematics
1 answer:
qaws [65]3 years ago
8 0

Answer:

Around 1,500 pounds

Step-by-step explanation:

Because you said "estimate," I will be estimating this.

49% rounds up to 50%

3,025 rounds down to 3,000

50% of 3,000 is 1,500 pounds.

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This question not incomplete

Complete Question

The life of a semiconductor laser at a constant power is normally distributed with a mean of 7,000 hours and a standard deviation of 600 hours. If three lasers are used in a product and they are assumed to fail independently, the probability that all three are still operating after 7,000 hours is closest to? Assuming percentile = 95%

Answer:

0.125

Step-by-step explanation:

Assuming for 95%

z score for 95th percentile = 1.645

We find the Probability using z table.

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After 7000 hours = P > 7000

= 1 - P(x < 7000)

= 1 - 0.95

= 0.05

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(P > 7000)³

(0.05)³ = 0.125

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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Step-by-step explanation:


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