Monica works 40 hours per week at two different jobs. she works h hours per week at the first job and is paid r dollars per hour. at her second job she is paid s dollars per hour. which expression gives her weekly pay from the two jobs?
answer choices
rh+(40-h)s
rh+(40+h)s
h(r+s)-40
rs+(40-h)
(40+h)(r+s)

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).