Danny lowers the sails on his boat. he paddles upstream at 19 km/hr. the current is still running downstream at 15 km/hr. what is the actual velocity of the boat? 34 km/hr, downstream 34 km/hr, upstream 4 km/hr, downstream 4 km/hr, upstream

upstream 4 km/h

Explanation:

Let's define "upstream" as positive direction for the velocities. Therefore, we have:

is the velocity of Danny paddling, which is positive because it is upstream

is the velocity of the current, which is negative because it is downstream

Velocity is a vector, so we have to calculate the resultant velocity. However, the two velocities are along the same direction (just with opposite sign), so their resultant is given by their sum:

and the positive sign means the direction is upward.

answer; how far out of place which the object finished relative to the starting location;