Ralph sold brownies for $0.66 a piece in order to earn money to buy baseball cards. if the cards cost $0..90 per pack, and if ralph had no money left over after buying them, what is the least number of brownies he must have sold? show method for answer if possible?

Awater holding tank measures 105 m long, 50 m wide, and 8 m deep. traces of mercury have been found in the tank, with a concen- tration of 60 mg/l. what is the total mass of mercury in the tank? answer in units of kg.

The total ticket sales for a high school basketball game were $2,260. the ticket price for students were $2.25 less than the adult ticket price. the number of adult tickets sold was 230, and the number of student tickets sold was 180. what was the price of an adult ticket?

Which function has the domain x> -11?