4. a tank contains 2 l of water in which is dissolved 4 g of a chemical. a solution containing 1 g/l of the chemical flows into the tank at a rate of 4 l/min, and the well-stirred mixture flows out at a rate of 3 l/min. determine the amount and concentration of the chemical in the tank after 10 minutes.

21

step-by-step explanation:

look at the picture.

y-intercept for the function on a picture is 4 → point (0, 4).

y-intercept for the function

is for x = 0. substitute:

y-intercept is 8 → point (0, 8).

yes.. it's proven to be 36.

answer: a

step-by-step explanation: the answer is a due to the rule of symmetry; that a line of symmetry must divide a figure into 2 pieces that are the exact same, only reflected over a line of symmetry. b and c do not have lines of symmetry and would not divide the figure evenly, thus making the answer a.