In 1819, the united states purchased florida from spain for
$5 x 106. the area of florida is about 6.6 x 104 square miles.
which key strokes on a calculator will give the cost the
united states paid for each square mile of florida?
a) 6.6ee4×
b) 6.6ee4÷5ee6
c)5ee6×6.6ee4
d)5ee6÷6.6ee4

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).