What is the quotient for 2 8/9 / (-5 8/9)

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?

Evaluate the expression. (9 + 5)(3 + 2)0

Which expression do you get when you eliminate the negative exponents of 4a^2 b^216a^-3 b