What is the length of a sticky note

For what value of (y) is 3^3/3^y =1/9

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. what distance from city a is the point where the truck and the car will meet?

What number line represents the solution set for the inequality -1/2 greater than or equal to 4