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tester [92]
3 years ago
8

A person's resting heart rate is typically between 60 and 100 beats per minute. Noah looks at his watch, and counts 8 heartbeats

in 10 seconds.Write an equation for h, the number of times Noah’s heart beats (at this rate) in m minutes.h = _______________
Use m as your variable. The problem expects an algebraic expression with variables for an answer.

PLEASE DO NOT ANSWER IF YOU DO NOT KNOW THE ANSWER. DO NOT ANSWER FOR POINTS IF YOU DO NOT KNOW WHAT THE ANSWER IS PLEASE. I REALLY NEED THE ANSWER. SO PLEASE PLEASE DO NOT ANSWER IF YOU DO NOT KNOW THE ANSWER AND JUST WANT THE POINTS.
Mathematics
1 answer:
sweet-ann [11.9K]3 years ago
6 0

Answer:

h=48

Step-by-step explanation:

You should create an even proportion. So you could do seconds over heartbeats or the other way around. I decided to do the other way around. Since yu want to see h in m minutes and in a minute there are 60 seconds, I did 8/10 = h/60. Instead of cross multiplying, I saw that 10 times 6 is 60 so 8 x 6=h. 8 x 6 = 48 so h=48.

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The plane flies a distance of approximately 10.536 kilometers in <em>straight</em> line and with a bearing of approximately 035°.

A plane that travels a distance r, in kilometers, with a bearing of \theta sexagesimal degrees can be represented in standard position by means of the following expression:

\vec r = r\cdot (\sin\theta, \cos \theta) (1)

We can obtain the resulting vector (\vec R) by the principle of superposition:

\vec R = \Sigma_{i=1}^{n} [r_{i}\cdot (\sin \theta_{i}, \cos \theta_{i})] (2)

If we know that r_{1} = 5\,km, \theta_{1} = 0^{\circ}, r_{2} = 6\,km, \theta_{2} = 60^{\circ}, r_{3} = 4\,km and \theta_{3} = 120^{\circ}, then the resulting vector is:

\vec R = 5\cdot (\sin 0^{\circ}, \cos 0^{\circ}) + 6\cdot (\sin 60^{\circ}, \cos 60^{\circ}) + 4\cdot (\sin 120^{\circ}, \cos 120^{\circ})

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The magnitude of the resultant is found by Pythagorean theorem:

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And the bearing is determined by the following <em>inverse</em> trigonometric relationship:

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If we know that R_{x} = 5\sqrt{3}\,km and R_{y} = 6\,km, then the magnitude and the bearing of the resultant is:

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\|\vec R\| \approx 10.536\,km

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\theta_{R} \approx 34.715^{\circ}

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To learn more on vectors, we kindly invite to check this verified question: brainly.com/question/21925479

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