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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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The system of inequalities models correctly the number of cookies is c + b ≥ 125 and 8c + 12b ≤ 2000

Let c represent the number of cookies and let b represent the number of brownies.

Since Genie want to make more than 125 cookies and brownies altogether, hence this is given by:

c + b ≥ 125   (1)

Also, Genie has a total of 2,000 grams of flour, hence:

8c + 12b ≤ 2000  (2)

Therefore the system of inequalities models correctly the number of cookies is c + b ≥ 125 and 8c + 12b ≤ 2000

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8 0
3 years ago
naomi needs to solve 28 ÷ 7 = ?what related multiplication fact can she use to find the unknown number?
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28/7 =4
7•4 is 28 or
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3 years ago
Question#10 will give brainliest!
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B. isolate the x^{2} by using inverse operations.

Step-by-step explanation:

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2 years ago
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A triangle has vertices at (3, 2), (-4,4), and (-2,5). What are the coordinates of the vertices of the image
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