HEE M Which statement best describes the thermosphere?

The thermosphere sits directly below the troposphere.

Lighter gases such as nitrogen and oxygen rise to the top of the thermosphere.

Heavier gases such as hydrogen and helium stay at the bottom of the thermosphere.

The atmosphere is so thin that gas molecules rarely contact each other.

Two students, each riding bicycles, start from the same apartment building and ride to the same building on campus, but each takes a different route. the first student rides 1100 m due east and then turns due north and travels another 1430 m before arriving at the destination. the second student heads due north for 1930 m and then turns and heads directly toward the destination. at the turning point, how far is the second student from the destination?

What kind of simple machine is a catapult?

Write a polynomial function with the given zeros x= -1,0,2show your work