Suponiendo que en San Salvador solo hay diez autobuses que circulan entre San Salvador y Zacatecoluca. Bajo esas condiciones.¿ De cuantas maneras podría viajar una persona de San Salvador a San Vicente y regresar en un autobús diferente? a) 9 b) 10 c) 19 d) 90

Determine the mean and variance of the random variable with the following probability mass function. f(x)=( 729divided by 91) (1 divided by 9) superscript x baseline comma x equals 1,2,3 round your answers to three decimal places (e. g. 98.765).

Amass weighing 16 pounds stretches a spring 8/3 feet. the mass is initially released from rest from a point 2 feet below the equilibrium position, and the subsequent motion takes place in a medium that offers a damping force that is numerically equal to 1/2 the instantaneous velocity. find the equation of motion if the mass is driven by an external force equal to f(t)=cos(2t).

The lengths of the two sides of a right triangle are 5 inches and 8 inches what is the difference the possible lengths of the third side of the triangle