Veronica sells berries at a farmer's market. She pays $45 for the booth, and earns $5 per pound of berries sold. She sells between 10 and 30 pounds of berries at each market. The function p(b)=5b−45 represents Veronica's market earnings as a function of pounds of berries sold.

What is the practical domain of the function?

all real numbers

all integers between 10 and 30 inclusive

10≤b≤30

{10, 20, 30}