4. From the top of a lighthouse, the angle of depression to a buoy is 20°. If the top of the lighthouse is 140 feet above sea level, find the distance from the buoy to the foot of the lighthouse.

Answer this question only if you know the 30 points and

8000 + 8800 + 8000 + 8 million + 80 trillion + another a katrillion equals

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?