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).​

Agymnast dismounts off the uneven bars in a tuck position with a radius of 0.3m (assume she is a solid sphere) and an angular velocity of 2rev/s. during the dismount she stretches out into the straight position, with a length of 1.5m, (assume she is a uniform rod through the center) for her landing. the gymnast has a mass of 50kg. what is her angular velocity in the straight position?

If angle "a" is 25°, angle "b" is: a) equal to angle c b) less than angle c c) greater than angle c

On a geologic map, if the contacts between sedimentary rock units form a bull’s-eye pattern of concentric circles, with the youngest unit in the center, the underlying structure is a(n)