During the "ice age," the continental glaciers originated at and expanded from
(multiple choice, one answer)
the north pole only
the south pole only
both poles
the northern areas of europe and north america

The correct answer is - the North Pole only.

During the Ice Age, or rather the glaciation, the continental glaciers originated from the North Pole and started expanding deeper into the continental masses from that starting point. The South Pole can be excluded because doesn't really matter if it is an Ice Age or not it is still frozen, plus Antarctica is surrounded with ocean waters thus the ice cannot expand further.

The glaciers during the Ice Age managed to occupy large portions of North America, coming as south as the northern part of what is now the United States. Also, the northern half of Europe and the northern half of Asia were also covered in ice.

there is no correct list among the choices you've provided.

the list might look something like this:

-- baby human

-- piccolo

-- flute

-- soprano singer

-- trumpet

-- tenor singer

-- trombone

-- baritone singer

-- baritone horn

-- bass singer

-- tuba

since i had to make up the list myself, i made it easy on myself, and i didn't try to shuffle the string instruments and woodwinds into it too.

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.