HELP! A boat heads directly north at 15m/s across a river to 300m wide flowing at 6m/s west. a) what is the velocity of the boat relative to the river bank? b)how long will it take to cross the river? **Please explain both (a) and (b).​

Which choice represents a pair of resonance structures? note that lone pairs have been omitted for clarity. view available hint(s) which choice represents a pair of resonance structures? note that lone pairs have been omitted for clarity. o=n−f and n=o−f o=o and f−f n≡c− and n≡c−h o−n=o and o=n−o?