Si un jugador de baloncesto encesta 8 lanzamientos 12 intentos, ¿cuántos tienen que hacer para lograr 20 canastas mantener el mismo nivel de acierto?

Let r = 3. what is the value of r + 58?

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?

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?