When the source of a sound is traveling toward a listener, the pitch that the listener hears due to the Doppler effect is given by the complex rational expression a/1- s/770 where a is the actual pitch of the sound and s is the speed of the sound source. Simplify this expression.​

Four individuals pool money together to start a new business and agree to split the profits equally. n invests $6,000, x invests $2,000, y invests $8,000 and z invests $4,000. if the profits for the first month were $100,000, y receives than if the profits were divided in proportion to how much they invested.