The cost for 4.5 pounds of shrimp $20.52 is. Find the unit price in dollars per pound.

Ahiking trail is 6 miles long. it has 4 exercise stations, spaced evenly along the trail. what is the distance between each exercise station?

Can someone me and do the problem plz so i can understand it more better

Aword processing program requires a 7- digit registration code made up of the digits 1,2,4,5,6,7 and 9 each number has to be used and no number can be used mor than once how many codes are possible