Aisha hiked each day for a week. the first day she hiked 1/6 mile, the second day she hiked 1/2 mile, and the third day she hiked 5/6 mile. by how much did she increase the distance she hiked each day?

What is the quadric regression equation that fits these data

Can someone me out here number 4 plz

Acar started driving from city a to city b, distance between which is 620 miles, at a rate of 60 mph. two hours later a truck left city b and started moving towards city a at a rate of 40 mph. how many hours after the truck's departure will the two meet?