Final answer:
The function f(x) = 1/ (25 |5x| + 4x) represents Jamal's exercise options in the stadium. The question is asking about the function and its relationship to Jamal's exercise options.
Step-by-step explanation:
The function f(x) = 1/ (25 |5x| + 4x) represents the option that Jamal has to run either up or down a staircase for exercise in a stadium.
The function gives the value of the function f(x) at any given point x. It is defined for all real numbers x, except when the denominator of the fraction equals zero.
The question is asking about the function and its relationship to Jamal's exercise options in the stadium.