Ana se compró una promoción de zapatos, en la compra de un par, el
segundo te sale a mitad de precio, si
el total fue de 1,050, ¿Cuál fue el
costo del par a precio normal y a
mitad de precio?

Multiplying an even number of negative numbers gives an answer that is choose from:

What is the binomial expansion of (2x-3)^5

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?