Houston has been hired as a salesman. he is paid a flat rate of $515 each week and earns an additional $17.50 commission for each sale. if x represents the number of sales and y represents the total earn, which equation will houston determine the amount he earns in one week? a.) y = $515h - $17.50 b.) y = $17.50h - $515 c.) y = $515h + $17.50 d.) y = $17.50h + $515

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).