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Nostrana [21]
3 years ago
8

Craig likes to collect records. Last year he had 14 records in his collection. Now he has 23 records. What is the percent of cha

nge of his record collection? (Round your answer to the nearest tenth) i just need help please!
Mathematics
1 answer:
Black_prince [1.1K]3 years ago
4 0
About 39%. What i did was 23-14 equals 9. then find 9 is what % of 23 on a calculator
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In an article about the cost of health care, Money magazine reported that a visit to a hospital emergency room for something as
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Answer:

Kindly check explanation

Step-by-step explanation:

Given the following :

Assume a normal distribution :

Mean (m) = 328

Standard deviation (sd) = 92

To obtain Zscore :

Zscore = (x - m) / sd

What is the probability that the cost will be more than $500?

x = $500

Zscore = (500 - 328) / 92 = 172 / 92 = 1.869 = 1.87

1 - p(Z < 1.87) = 1 - 0.9693 = 0.0307

b. What is the probability that the cost will be less than $250?

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p(Z < - 0.85) = 0.1977

c. What is the probability that the cost will be between $300 and $400?

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p(Z < - 0.3) = 0.3821

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d. If the cost to a patient is in the lower 8% of charges for this medical service, what was the cost of this patient’s emergency room visit?

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P (Z < Zscore) = 0.08

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-129.72 + 328 = x

x = 198.28

4 0
3 years ago
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