Radical Equation Word Problems - Examples & Practice

When Anant goes out to eat, the number of plates he needs to hold all of his food is related to how hungry he is by the following equation: $$p = \frac{1}{3}\sqrt{4h + 1}$$ where $p$ is the number of plates he needs and $h$ is the amount of hunger units Anant feels. If Anant has $20$ units of hunger, how many plates does he need?