X es una v. a.d. que toma dos valores a y b con probabilidades p(a)= p p(b)=1−p Calcula V[X]

Aman steps out of a plane at a height of 4,000m above the ground falls 2,000m very quickly and then opens his parachute and slowly falls the remaining 2000m to the ground what height above the ground would be the best choice for a reference point

1-for what value of x is line a parallel to line b 2-for what value of x is line a parallel to line b

Which equation represents the function on the graph?