9x^2 + 4x^3
Hope this helped
A; rate of change is the same as slope, so, using the slope formula,

, where

is the slope and

,

,

, and

are the

and

values.
Plug in

points for

and

, water level being the

and time being the

since we're looking for the answer in ft/hr-- you can choose any two, but from the same row.




ft/hr
215 seconds
100/120=.833
.833×258= 215
Answer:
-7
Step-by-step explanation: