Please help me Functions f: R - > R and g: R -> R are specified by the following rules:

fx=x3 and gx={3x-1, if x ≥0 -x , if x<0
Find f∘g and g∘f if they are defined.
Explain why if it is not defined.

After t seconds, a ball tossed in the air from the ground level reaches a height of h feet given by the equation h = 144t-16t^2. after how many seconds will the ball hit the ground before rebounding?

Afarmer has a large field that is x feet in length. he wants to fence in a rectangular section in the middle of the field , leaving a length of 100 feet of open field behind each end of the fenced rectangle. he also wants the width of the fenced-in space to be 100 feet less than its length. find the expressions to represent the length and width of the fenced section of the field

Two numbers have a sum of 93. if one number is p, express the other number in terms of p.