I don’t understand how to do this

Linda loans her friend $250 with a 5% monthly intrest rate. how much was the whole loan?

Jalen charges $25.50 for every 3 hours of yard work he does for his neighbors. ralph charges $34 for every 4 hours of work that he does. who charges less? opinions: 1.they charge the same amount 2.jalen 3.ralph

Jim had 15 minutes to do 5 laps around his school what would his time be