Mixing problems occur quite frequently in chemical industry. we explain here hov. to solve the basic model
involving a single tank. the tank in fig. i) contains 1000 gal of water in which initially 100 ib of salt is dissolvcd.
brine runs in at a rate of 10 gal/min. and each gallon contains 51b of dissoved salt. the mixture in the tank is
kept uniform by ~tirring. brine ['uns our at 10 gal/min. find the amount of salt in the tank at any time t.

Which one is true about the hexagons ?

In the following diagram it is given that dec,ab || dc, ad || eb, and ad is congruent to bc. a)why isn't abc a parallelogram even though it has a pair of parallel sides and a pair of congruent sides b)explain why be must be congruent to bc. further explain what type of triangle this makes triangle abc and what it tells you about angle 1 and angle 2c) finally why must angle 3 be congruent to angle 1? further, explain why we know that angle 3 is congruent to angle 2

Sample response: if the graph passes the horizontaline test, then the function is one to one. functions that are one to one have inverses that a therefore, the inverse is a hinction compare your response to the sample response above. what did you include in your explanation? a reference to the horizontal-line test d a statement that the function is one-to-one the conclusion that the inverse is a function done