Why must an air traffic controller know a plane's velocity? A. to know how far away the plane is
B. to know how high the plane is flying
C. to know the plane's overall rate of motion
D. to know the plane's direction as well as its speed

(2,20) means that the 2 is 2 hours and 20 is 20$. so there both 20$ for 2 hours only the same price. like it says. so, the dunk tank and the bounce house are the same price (20$) for the same amount of time (2 hours).

hope i

greater than one

step-by-step explanation: