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alexira [117]
3 years ago
15

E:

Mathematics
1 answer:
Aleks04 [339]3 years ago
6 0

Answer:

b

Step-by-step explanation:

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The water level in a reservoir is now 52 meters. If this was 23% increase, what was the initial depth
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Answer:

1.23x=52

Step-by-step explanation:

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Help need answer and explanation
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A box of pasta contains 16 ounces of pasta. If on serving weighs 1/3 ounces, how many servings are in one box of pasta
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A college-entrance exam is designed so that scores are normally distributed with a mean of 500 and a standard deviation of 100.
yawa3891 [41]

Answer:

The probability is  0.003

Step-by-step explanation:

We know that the average \mu is:

\mu=500

The standard deviation \sigma is:

\sigma=100

The Z-score is:

Z=\frac{x-\mu}{\sigma}

We seek to find

P(x800)

For P(x>800) The Z-score is:

Z=\frac{x-\mu}{\sigma}

Z=\frac{800-500}{100}

Z=3

The score of Z = 3 means that 800 is 3 standard deviations from the mean. Then by the rule of the 8 parts of the normal curve, the area that satisfies the conficion of 3 deviations from the mean has percentage of 0.15%

So

P(x>800)=0.15\%

For P(x<200) The Z-score is:

Z=\frac{x-\mu}{\sigma}

Z=\frac{200-500}{100}

Z=-3

The score of Z = -3 means that 200 is 3 standard deviations from the mean. Then by the rule of the 8 parts of the normal curve, the area that satisfies the conficion of 3 deviations from the mean has percentage of 0.15%

So

P(x

Therefore

P(x800)=P(x800)

P(x800)=0.0015 + 0.0015

P(x800)=0.003

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3 years ago
HELP PLS!! A study conducted by the Center for Disease Control that asked 15,000 students about their sleep habits showed that a
nexus9112 [7]

Answer:

Step-by-step explanation:

so if you have 15k and 73% and 8 hours what you need to do is do the math and do 15x8 what did you get so you have to go to the 73% what was you answer to 15x8 add that to 73 and you can do 45 in to 100

8 0
3 years ago
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