According to one model that takes into account air resistance, the acceleration a(t) in m/s2 of a skydiver of mass m in free fallsatisfies a(t) = -9.8 +v(1)², where v(t) is velocity, negative since the object is falling, and k is a constant. Suppose that
m = 70 kg and k = 13 kg/m.
What is the object's velocity when a(t) = -8.6?
(Use decimal notation. Give your answer to two decimal places.)
v(t) =?
