# math

posted by
**alice**
.

Tank 1 initial contains 70 L (liters) of water

and 450 g of salt, while tank 2 initially contains 20 L of water

and 200 g of salt. Water containing 10 g/L of salt

is poured into tank1 at a rate of 1 L/min while the mixture

flowing into tank 2 contains a salt concentration of 50 g/L

of salt and is flowing at the rate of 4 L/min.

The two connecting tubes have a flow rate of 4 L/min from

tank 1 to tank 2; and of 3 L/min from tank 2 back to tank 1.

Tank 2 is drained at the rate of 5 L/min.

how do you find q'(t)?

how do you find the initial values of p and q?