What is 105 to 150 simplified as a ratio

Use the function f(x) is graphed below. the graph of the function to find, f(6). -2 -1 1 2

If f(x)=2x-6 and g(x)=3x+9, find (f-g)(x)

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?