What is the equivalent ratio to 156: 390

Write a function for a rotation 90 degrees counter clockwise about the origin, point 0

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?

Which inequality is equivalent to -3x < -12? x < 4 , x < -4 , x > 4, x > -4