50 points julianne opens a dance studio her start-up cost for the building, advertising, and supplies total $52,000. each day, she spends $680 on operating costs (like utilities and wages). she earns 960 per day from her student’s lesson fees. part a: write an equation or inequality to represent this situation. let d be the number of days. part b: when will julianne begin making a profit? show all the work.