Can someone me with this: a swimming pool is 50m long and 20 m wide. its depth decreases linearly along the length from 3m to 1m. it is initially empty and is filled at a rate of 1m^3/min. how fast is the water level rising 250 min after the filling begins? how long will it take to fill the pool?

Sketch the vector field vector f( vector r ) = 8vector r in the xy-plane. select all that apply. the length of each vector is 8. the lengths of the vectors decrease as you move away from the origin. all the vectors point away from the origin. all the vectors point in the same direction. all the vectors point towards the origin. the lengths of the vectors increase as you move away from the origin.