Teorema del coseno.

dos coches se encuentran a 22 km de distancia. Se desplazan por una superficie rectilinia en direcciones contareas a velocidades de 6 y 8khm/h. Si a las 2'5 horas los dos coches coinciden en el punto P:
Calcula
A): Angulo de sus trayectorias en el punto P
B) Si despues de encontrarse en el punto P siguen moviendose sin cambiar la trayectoria i velocidad, calcula el tiempo que ha de pasar para que se encuentren, y la distancia recorrida por cada uno.

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 to use order of operation in 20 divide by 4 multiply 5 = 1

Offering 30 if a plus b plus c equals 68 and ab plus bc plus ca equals 1121, where a, b, and c are all prime numbers, find the value of abc. the answer is 1978 but i need an explanation on how to get that.