Which of the following would you do if you were to write the expression 3 * 3 * 3 *3 * 3 * 3 *3 * 3 * 3 *3 * 3 * 3 using an exponent?

check al that apply.

a. you would write 12^3
b. you would use 12 as the base and 3 as the exponent.
c. you would write 3^12
d. you would use 3 as the base and 12 as the exponent.

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).