The organ system that obtains oxygen from the air and disposes of waster carbon dioxide back into the air is the system. PLS HELP

An object accelarates from rest to a velocity of 2.4m/s over a distance of 16m what was its accelaration

Which of the following statements is true about taste bud preferences? a. taste buds respond exclusively to a certain taste sensation, like saltiness. b. taste buds have the ability to respond to all of the taste sensations. c. taste buds do not differentiate between bitter and salty sensations. d. taste buds have the capability to detect three taste sensations.

What is a system where wealth and property are privately held and profit is the goal rather than providing for collective needs? a. capitalism b. socialism c. communism d. feudalism