What is the factored form of the expression over the complex numbers?

16x^2+9y^2

The hawaiian alphabet has 12 letters. how many permutations are posible for each number of letters?

Which graph corresponds to the function f(x) = x2 + 4x – 1?

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?