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3 years ago

The altitude of a plane is 1,600 ft. What must be the altitude of a submarine so that the sum of their altitudes is 0?

Mathematics

2 answers:

RSB [31]3 years ago

7 0

You must mean the depth of the submarine.

to make sum = zero the depth of the sub must be -1600 ft..

Vlada [557]3 years ago

5 0

1600 - 1600 = 0

so the sub needs to be -1600 feet

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Lilit [14]

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The confidence interval is 6.6<μ<6.8.

Step-by-step explanation:

We have:

Number of observations = 601

Mean = 6.7

Standard deviation σ = 1.5

The z-score for a 95% confidence interval is 1.96.

The limits of the confidence interval can be calculated as

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3 years ago

Express y in terms of x in the equation ax + by = c where b ≠ 0.

marissa [1.9K]

The equation of y in terms of x is y =(c/b) - (a/b)x

<h3>What is an Equation ?</h3>

An Equation is a mathematical statement formed when two algebraic expressions are equated with an equal sign.

The equation given in the question is

ax + by = c , b ≠ 0.

Express y in terms of x in the equation

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2 years ago

A market surveyor wishes to know how many energy drinks teenagers drink each week. They want to construct a 80% confidence inter

jasenka [17]

Answer:

The 80% confidence interval for the mean

(4.6199 , 4.7801)

Step-by-step explanation:

<u>Explanation</u>:-

Assuming that the population standard deviation for the number of energy drinks consumed each week is 1

Given the Population standard deviation 'σ' = 1

The study found that for a sample of 256 teenagers the mean number of energy drinks consumed per week is 4.7

given sample size 'n' = 256

mean of the sample 'x⁻' = 4.7

<u>confidence interval for the mean</u>

The 80% confidence interval for the mean is determined by

$(x^{-} -Z_{\alpha } \frac{S.D}{\sqrt{n} } , x^{-} + Z_{\alpha }\frac{S.D}{\sqrt{n} } )$

the z-score of 80% level of significance = 1.282

$(4.7 - 1.282\frac{1}{\sqrt{256} } , 4.7 + 1.282\frac{1}{\sqrt{256} } )$

(4.7 - 0.0801 , 4.7 +0.0801)

(4.6199 , 4.7801)

<u>Conclusion</u>:-

The 80% confidence interval for the mean

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3 years ago