The graph shows the water level in a bathtub, in inches, over time, t, in minutes.
for which values of t (time) is the water level unchanging?
choose all answers that are correct.
a.
from t = 0 to t = 3
b.
from t = 3 to t = 5
c.
from t = 5 to t = 7
d.
from t = 7 to t = 12
e.
from t = 12 to t = 15