Atank is filled with 1000 liters of pure water. brine containing 0.07 kg of salt per liter enters the tank at 9 liters per minute. another brine solution containing 0.06 kg of salt per liter enters the tank at 8 liters per minute. the contents of the tank are kept thoroughly mixed and the drains from the tank at 17 liters per minute. a. determine the differential equation which describes this system. let s(t) denote the number of kg of salt in the tank after t minutes. then dsdt= b. solve the differential equation for s(t). s(t)=

A. S(t)= 1000 + 0.63t + 0.48t - 17t

              B. S(t)= 984.11

Step-by-step explanation:

answer: b. f(x) = (x + 2)^3 (x^2 - 7x + 3)^4

step-by-step explanation:

polynomials always have as many roots as their order. this is a 4th order polynomial- hence 4 roots!

complex roots of polynomials always come in pairs. the quadratic equation has the "+/-" in that will alwaysgenerate m+ni amd m-ni, so 7-2i must be a root of this polynomial equation.

the order of the numerator and denominator are both 2. so the horizontal asymptote is y=a2/b2 =7

verticle asymptotes are the forbidden x-values. f(x) becomes undefined at x=-3 because this value will cause a zero denominator.

a graph of r(x) will have vertical asymptotes at ±1 because these values will make the denominator zero. so the domain of the function cannot include ±1.

you 're wlecome! : )

cretdit to source

no i do not : ( what is it?