The area of a small sector is pi inches squared. What is the circumference of the circle?

What is the smallest integer n such that n\sqrt{2} is greater than 20

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?

Savannah had 40 iris blooms last year this year she had 15% more iris blooms how many more hours blooms did savannah have this year