Who am I and how can I make a difference ​

Does anyone know the answers to these two? i don’t want to have to guess, you!

The vertical height of a soccer ball can be represented by the following function, where h(x) represents the height, in feet, x seconds after the soccer ball is kicked. rewrite the function in the form that reveals the times at which the soccer ball is on the ground.

What word or phrase is modified by the prepositional phrase in the sentence below? marisol's puppy likes napping under the couch because it is warm and cozy