100 points help plz

Vonda works between 30 and 32 hours per week at a hair salon. She pays a one time $250 chair rental fee, and earns $40 per hour that she works. The hours she works are rounded to the nearest quarter hour.

The function p(h)=40h−250

represents Vonda's weekly pay as a function of hours worked.

What is the practical domain of the function?

{30, 31, 32}

all real numbers
30≤h≤32
{30, 30.25, 30.5, 30.75, 31, 31.25, 31.5, 31.75, 32}