Atank contains 1000l of pure water. brine that contains 0.04kg of salt per liter enters the tank at a rate of 5l/min. also, brine that contains 0.1kg of salt per liter enters the tank at a rate of 10l/min. the solution is kept thoroughly mixed and drains from the tank at a rate of 15l/min. answer the following questions.1. how much salt is in the tank after t minutes?
answer (in kilograms): s(t)=?
how much salt is in the tank after 5 hours?
answer (in kilograms): ?

step-by-step explanation:

you divide the denominator by the numerator on both sides and if the quotients are equal then the fractions are equivalent

12cm

the answer is d

b

step-by-step explanation:

the equation of a line in point- slope form is

y - b = m(x - a)

where m is the slope and (a, b) a point on the line

calculate m using the slope formula

m = (y₂ - y₁ ) / (x₂ - x₁ )

with (x₁, y₁ ) = (0, 4) and (x₂, y₂ ) = (3, - 5) ← 2 points on the line

m = = = - 3

with m = - 3 and (a, b) = (3, - 5), then

y - (- 5) = - 3(x - 3), that is

y + 5 = - 3(x - 3) → b