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Ede4ka [16]
3 years ago
15

A diver’s elevation is −30 feet relative to sea level. She dives down 12 feet. What is her elevation after the dive

Mathematics
2 answers:
nignag [31]3 years ago
7 0
I think it is -42 Your welcome
pashok25 [27]3 years ago
4 0
I believe her elevation would be -42 
-30 - 12 = -42 

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Extreme cold and hot temperatures are known to affect the operation of electronic components. Winter is approaching and you are
Musya8 [376]

Answer:

A 95% confidence interval for the true mean minimum temperature that will damage an iPod is between 2.55°F and 7.45°F

Test statistic(Z) = 2.31

P-value = 0.0104

Step-by-step explanation:

Step 1

Null hypothesis: The average damaging temperature of nine iPods is 5°F

Alternate hypothesis: The average damaging temperature of nine iPods differs from 5°F

Step 2

Mean=5°F, Sd=3, df=n-1=9-1=8

The t-value corresponding to 8 degrees of freedom and 95% confidence level (5% significance level) is 2.306

Confidence Interval(CI) = (mean + or - t×sd/√n)

CI = (5 + 2.306×3/√8) = 5 + 6.918/2.828= 5+2.45=7.45°F

CI = (5 - 2.306×3/√8) = 5-2.45 = 2.55°F

Z = (sample mean - population mean)/(sd÷√n) = (5-2.55)/(3÷√8) = 2.45/1.061 = 2.31

Step 3

Using the standard distribution table, the cumulative area to the left of Z = 2.31 is 0.9896

P-value = 1 - 0.9896 = 0.0104

Step 4

Conclusion: A 95% confidence interval for the true mean minimum temperature that will damage an iPod is between 2.55°F and 7.45°F

7 0
3 years ago
HELPPPP MEEE PLSSSSSS
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Answer: width is 7

Step-by-step explanation:

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.. 7812= 36×W×31

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azamat

Answer:

y=x+1

Step-by-step explanation:

1) <u>Find the </u><u>slope</u>

m=-3-4/-4-3

m=-7/-7

m=1

2) <u>Use </u><u>y</u><u>=mx+</u><u>c</u>

<u>by </u><u>using </u><u>the </u><u>point </u><u>(</u><u>3</u><u>,</u><u>4</u><u>)</u>

<u>4</u><u>=</u><u>1</u><u>(</u><u>3</u><u>)</u><u>+</u><u>c</u>

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<u>c=</u><u>1</u>

3) <u>The </u><u>answer</u>

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Number 1 or also called a half
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