Ep coin is tossed. The number cube and the coin are fair. What is the probability that the number rolled
less than 4 and the coin
A number cube is rolled and
toss is heads?
Write your answer as a fraction in simplest form.

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).