1 Let the salmon have the M rule at the beginning and the Z rule at the rest.

z=m-(0.00 1m^2+0.002)t

2 z= 10^6-( 10^9+0.002)t

According to the above formula, when z=0, that is, 10 6 = (10 9+0.002) t, the salmon is ready.

t= 10^6/( 10^9+0.002)

In minutes, t is approximately equal to11000t.