Avector a with an x-component of 6.00 and a y-component of -4.40 is added to a vector b with x-component 3.30 and a y-component of -5.60. what is the magnitude of the resultant vector? use proper significant figures.

A1500 w electric heater is plugged into the outlet of a 120 v circuit that has a 20 a circuit breaker. you plug an electric hair dryer into the same outlet. the hair dryer has power settings of 600 w, 900 w , 1200 w, and 1500 w. you start with the hair dryer on the 600 w setting and increase the power setting until the circuit breaker trips. under what setting does the circuit breaker trip.