What is a form of matter that waves can move through?

A form of matter that waves move through is called a medium.

Explanation: Waves form with vibrations. A water wave is a vibration in a liquid. A sound wave is whenever there is vibration in a gas. (air) These mechanical waves travel through a medium, causing them to collide with each other, and they transfer energy from one to another.

a: 45.9 meters

b: 4.29 seconds

step-by-step explanation:

a: h(t)=1/2(-9.8)(3)^2+0(3)+90

h(t)=-4.9(3)^2+90

h(t)=-44.1+90

h(t)=45.9 meters

b: 0=1/2(-9.8)(t^2)+0t+90

0=-4.9t^2+90

-90=-4.9t^2

18.37=t^2

t=4.29 seconds

in the second question, the numbers aren't exact, but they're a close approximation.

c, liquids evaporate, creating a gas