What is the value of x when the richter scale rating is 5.9 round your answer to the nearest hundredth

You and a friend race across a field to a fence and back. your friend has a 50-meter head start. the equations shown represent you and your friend's distances dd (in meters) from the fence tt seconds after the race begins. find the time at which you catch up to your friend. you: d=∣−5t+100∣d=∣−5t+100∣ your friend: d=∣−313t+50∣∣

Can someone explain to me how to do

Sara made $253 for 11 hours of work. at the same rate how much would he make for 7 hours of work?