Alifeguard at a swimming pool gives one-hour swim lessons to children in the morning before the pool is open to the public. she earns four dollars per class and fifty cents per swimmer. the minimum wage in her state is $7.25. she hopes to earn more than that amount of money during each class. write an inequality that models the situation and find the minimum number of students she must teach in each class so that her earnings for that hour exceeds the minimum wage in her state.