SERIOUSLY HEL What is the end behavior of the graph of f(x) = – 0.5x2 – 3x – 4?

A.
as x increases, f(x) increases;

as x decreases, f(x) decreases

B.
as x increases, f(x) decreases;

as x decreases, f(x) decreases

C.
as x increases, f(x) increases;

as x decreases, f(x) increases

D.
as x increases, f(x) decreases;

as x decreases, f(x) increases

You were told that the amount of time lapsed between consecutive trades on the new york stock exchange followed a normal distribution with a mean of 15 seconds. you were also told that the probability that the time lapsed between two consecutive trades to fall between 16 to 17 seconds was 13%. the probability that the time lapsed between two consecutive trades would fall below 13 seconds was 7%. what is the probability that the time lapsed between two consecutive trades will be between 14 and 15 seconds?