the radius of a hailstone varies directly with the amount of time that it was in a cloud after a hailstone in a particular cloud for 10 seconds, its radius was 0.5 inches. how long would it be in the cloud to have a radius of l.25 inches

Which of the following represents the range of the graph of f(x) below

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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).