math

A spray rig moving at 3 mph delivers 44 gallons per acre when the nozzles on the rig are 20 inches apart.
a) Suppose the number of nozzles were increased so that they were only 15 inches apart. Find the new delivery rate of the rig.

b) How could this revised delivery rate be achieved by changing the speed of the rig instead of the spacing of the nozzles?

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