Quinn is playing video games at a virtual reality game room . the game room charges 20 dollars for every 30 minutes of play time . how many does quinn need to pay for 150 minutes of play time ?

He ! a group of farmers planned to clean 80 acres of wheat per day to finish the work on schedule. right before the work started, they received a new piece of machinery that them clean 10 more acres per day than originally planned. as a result of increased productivity in the last day before the deadline they only had to clean 30 acres. how many acres of wheat did the group of farmers have to clean?