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just olya [345]
3 years ago
8

The respiratory system can be a limiting factor in maximal exercise performance. researchers from the united kingdom studied the

effect of two breathing frequencies on both performance times and several physiological parameters in swimming. subjects were 10 male collegiate swimmers. here are their times in seconds to swim 200 meters at 90% of race pace when breathing every second stroke in front crawl swimming: 151.6 165.1 159.2 163.5 174.8 173.2 177.6 174.3 164.1 171.4 the correct units for the standard deviation of the data is
Mathematics
1 answer:
Nastasia [14]3 years ago
6 0

We can solve for the standard deviation by first calculating the mean.

X = mean

X = (151.6 + 165.1 + 159.2 + 163.5 + 174.8 + 173.2 + 177.6 + 174.3 + 164.1 + 171.4) / 10

X = 167.48

 

The standard deviation is:

S = standard deviation

S = sqrt{[(167.48-151.6)^2+(167.48-165.1^2+(167.48-159.2)^2+(167.48-163.5)^2+(167.48-174.8)^2+(167.48-173.2)^2+(167.48-177.6)^2+(167.48-174.3)^2+(167.48-164.1)^2+(167.48-171.4)^2]/(10-1)}

<span>S = 8.2 seconds</span>

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Two cargo ships are sailing a direct course into harbor. Ship A is 22 miles from harbor. Ship Bis sailing into harbor on a cours
s344n2d4d5 [400]

Answer:

The distance of ship B from the Harbor is 32.26 miles

Step-by-step explanation:

Hello, great question. These types are questions are the beginning steps for learning more advanced Equations.

I have added a visual aid of the problem. As we can see the courses of both ship to the harbor forms a triangle with ship B being the hypotenuse. Since we are given the distance of the course for ship A and the angle between both ships, we can use this information with the <u>COSINE operator</u> to solve for the length of the course of ship B.

cos(x) = \frac{adjacent}{hypotenuse}

cos(47) = \frac{22miles}{hypotenuse} .... flip both fractions.

\frac{1}{cos(47)} = \frac{hypotenuse}{22miles} .... multiply both sides by 22

\frac{22mi}{cos(47)} = hypotenuse

32.26mi = hypotenuse = B

So the distance of ship B from the Harbor is 32.26 miles

I hope this answered your question. If you have any more questions feel free to ask away at Brainly.

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3 years ago
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Answer:

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Step-by-step explanation:

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In short, Your Answer would be: -10

Hope this helps!
7 0
3 years ago
Read 2 more answers
An Internet and cable-television supplier surveyed a random sample of their customers. The results are shown in the table.
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For the statement "....A 4-column table with 3 rows. The first column has no label with entries internet, cable television, or total. The second column is labeled satisfied with entries ..." statement about the two-way frequency table that is true is  About one-fourth of the cable-television customers are not satisfied. Option D.

This is further explained below.

<h3>What is a two-way frequency table?</h3>

Generally,  A two-way table may be used to show the frequency of occurrence of two categories. A row represents a single category, whereas a column represents a different category.

In conclusion, There are 3,141 customers in total, of which 2,032 are internet customers and 1,109 are cable customers.

Read more about the two-way frequency table

brainly.com/question/12576014

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2 years ago
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