The only time something is not even or odd it has to equal 0
^-^
Answer:
they spend the time for swimming is 11/4 ✖ 2 =22/4
that's means in hours =5 hours 30 minutes
The staircase represents a constant rate of change because the height of the staircase is always going up or down, or changing. Each time the staircase goes up by a certain number, it always goes up by the same number and is therefore a constant rate of change.