The Velocity of a Sky Diver T Seconds After Jumping $v ( t ) = 80 \left( 1 - e ^ { - 02 t } \right)$

Short Answer

The velocity of a sky diver t seconds after jumping is given by $v ( t ) = 80 \left( 1 - e ^ { - 02 t } \right)$ . After how many seconds is the velocity 60 ft/s?