Atank contains 100 kg of salt and 2000 l of water. pure water enters a tank at the rate 12 l/min. the solution is mixed and drains from the tank at the rate 6 l/min. (a) what is the amount of salt in the tank initially? amount = (kg) (b) find the amount of salt in the tank after 1.5 hours. amount = (kg) (c) find the concentration of salt in the solution in the tank as time approaches infinity. (assume your tank is large enough to hold all the solution.) concentration = (kg/l)

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step-by-step explanation:

the correct answer option is (2x-3)(2x+3).

step-by-step explanation:

we are given the following expression and we are to factorize it:

we are to find such factors that when multiplied they give a result of 36 (9 x 4 = 36) and when added they give a result of 0.

the two such factors of 36 are negative six and postive six.

factorizing the given expression to get:

therefore, the correct factorization of is (2x-3)(2x+3).

step-by-step explanation:

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