Radical Equation Word Problems - Examples & Practice

Meredith's happiness is directly proportional to the number of hours she plays soccer. Let's say this relationship can be modeled with the following equation, where $h$ is happiness units and $s$ is the number of hours she played soccer: $$h = 25 + \sqrt{50s}$$ If Meredith currently has $70$ happiness units, how many hours of soccer did she play (rounded to the nearest hour)?