PLEASE HELP ASAP WITH THESE 2 part questions!!!!!!!! AND EXPLAIN PLS!

The seventh-grade class is putting on a variety show to raise money. It cost $700 to rent the banquet hall that they are going to use. If they charge $15 for each ticket, write an inequality to show how many tickets do they need to sell in order to raise at least $1000? Use t as the variable. Also, solve the problem as well.