Henry picks 10.38 pounds of apples. He uses 0.3 of the apples to make an apple pie. How many pounds of apples does Henry use to make the apple pie? Please show or explain how you got the answer :]

If you don't put the answer or explanation I will report you
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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).