In PE coach tells you you will be running a mile today so he wants you to warm up and stretch. Coach has the class line up at the starting line and yells GO! As you run, you breathe harder to bring in more oxygen. Your heart begins pumping faster to send that oxygen to your body’s cells. Your blood picks up the gas waste products from your cells and delivers it back to the lungs to be removed.

Please tell me which systems are working together to help sustain your body as you exercise in PE. You should have a minimum of 3 for partial credit.

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explanation:

2b2t

where is the photo and the answer choices?

russian is not my first language, so i'm afraid i can't write out an answer in russian, but hopefully you can find a way to do so. here's my best translation of the problem: you're given a plot of a particle's position in one-dimensional space over time, and you're asked to find either the total distance traveled by the particle after 6 seconds had elapsed, or the total displacement of the particle after 6 seconds.

if you want the total distance traveled, you would first need to determine the particle's velocity as a function of time, then integrate that over the 6-second interval. we know the position function is quadratic with roots at 0 and 6, so we have

where is unknown. because the position is parabolic, there is symmetry about the midpoint at , and we know that

so that the position function is

which means the velocity is

then the total distance traveled is

so the total distance traveled is 20 m.

on the other hand, if you want to find displacement: the particle starts at and ends at , so its displacement is 0.