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2 years ago

I’ll give brainlist to the correct one to both answers

Mathematics

2 answers:

yawa3891 [41]2 years ago

5 0

Answer

u see the bow is 16ft and the stern 70 ft below ground now u use integers.

Step-by-step explanation:

hope this help a bit im not the best i at least give me thank you!

Lady bird [3.3K]2 years ago

4 0

For the second one.

Bow:

The first is 16ft below sea level.

Key word: Below

The integer for this one is -16

Stern:

The second is 70ft below sea level.

Key word: Below

The integer for 70ft below is: -70

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Answer: 15% of 13.80 = 1.95

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Answer:

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2 years ago

On Saturday, 90 people visited a museum, Tickets to the museum cost

AveGali [126]

Answer:

64 adult tickets were sold

Step-by-step explanation:

Let a = adult tickets sold

c = child tickets sold

a+c = 90 since there were 90 tickets sold

12a+7c = 950 since the amount of money collect is 950

c = 90-a

Substitute this into the second equation

12a +7( 90-a) = 950

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12a + 630-7a = 950

Combine like terms

5a +630 = 950

Subtract 630 from each side

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2 years ago

An air transport association surveys business travelers to develop quality ratings for transatlantic gateway airports. The maxim

Flura [38]

Answer:

The 95% confidence interval estimate of the population mean rating for Miami is (6.0, 7.5).

Step-by-step explanation:

The (1 - α)% confidence interval for the population mean, when the population standard deviation is not provided is:

$CI=\bar x \pm t_{\alpha/2, (n-1)}\cdot \frac{s}{\sqrt{n}}$

The sample selected is of size, n = 50.

The critical value of t for 95% confidence level and (n - 1) = 49 degrees of freedom is:

$t_{\alpha/2, (n-1)}=t_{0.05/2, 49}\approx t_{0.025, 60}=2.000$

*Use a t-table.

Compute the sample mean and sample standard deviation as follows:

$\bar x=\frac{1}{n}\sum X=\frac{1}{50}\times [1+5+6+...+10]=6.76\\\\s=\sqrt{\frac{1}{n-1}\sum (x-\bar x)^{2}}=\sqrt{\frac{1}{49}\times 31.12}=2.552$

Compute the 95% confidence interval estimate of the population mean rating for Miami as follows:

$CI=\bar x \pm t_{\alpha/2, (n-1)}\cdot \frac{s}{\sqrt{n}}$

$=6.76\pm 2.000\times \frac{2.552}{\sqrt{50}}\\\\=6.76\pm 0.722\\\\=(6.038, 7.482)\\\\\approx (6.0, 7.5)$

Thus, the 95% confidence interval estimate of the population mean rating for Miami is (6.0, 7.5).

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