10. Sandwiches cost $5, French fries cost $3, and drinks cost $2. The expression 5n+ 3n+ 2n gives the total cost, in dollars, for buying a sandwich, French fries, and a drink for n people. Which is another way to write this expression? A. 10n B. 10 C. 30n -8. 301​

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).