Situation 2: A NASA engineer wants to see if salt will reduce the amount of ice and snow buildup on the runway. She spread 200 lbs of salt on a test runway and simulates an airplane
landing by using test equipment. She then repeats the test on a runway without applying salt.
Hypothesis
If
then
I
Situation 3: The tree house detectives want to see if different smells travel at the same speed.
They spray a can of hairspray, peppermint air freshener, and insect repellant at the same time.
Six friends stand around them in a large circle, five feet from the center of the circle where the
three tree house detectives stood.
Hypothesis:
If
then
Situation 4: The tree house detectives want to know if the candy making process affects the
odor given off by candy. To conduct the experiment, the help Dr. D make orange taffy candy.
Hypothesis:

watch you tube or play clash royale, mainly clash royale

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.