Answer:
The respiratory system is a biological system consisting of specific organs and structures used for gas exchange in animals and plants. The anatomy and physiology that make this happen varies greatly, depending on the size of the organism, the environment in which it lives and its evolutionary history.
9ft shadow
Set up a proportion with height/shadow
8/18=4/x, cross multiply
8x=72
x=9
Answer:
2 i think
Step-by-step explanation:
Answer:
=−21x2+5x+4
Step-by-step explanation:
Let's simplify step-by-step.
4−3(7x2)+5x
=4+−21x2+5x