a test car travels in a straight line along the x axis. the graph in the figure shows the cars position x as a function of time. find the instantaneous velocity at point b

Answerapplying a direct current to a non magnetic material in order to create a electromagnetic field; plz check first good luck;

The boat's velocity relative to the riverbank can be resolved into two components. the component going north is 2.7 m/s and the component going west is 1.2 m/s.we add these two vectors and then find the magnitude of the resultant to get the speed.the magnitude of the resultant vector from adding can be obtained by the pythagorean theorem.    to two significant figures, the boat's speed relative to the riverbank is 3.0 m/s.