Which is the same as dividing a number by 10?

a. move the decimal one place to the left.

b. move the decimal one place to the right

c. move the decimal two places to the left.

d. move the decimal two places to the right.

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).