a dolphin that just manage to keep up with a speeding boat for a distance of 2km for a period of 3h in (answer in km/h)​

Excuse ! extra points plus ! super desperate ! the position of an object does not move relative to a reference point. relative to the reference point the object _. a.) is not moving. b.) is moving.

According to social exchange theory, altruistic behaviors benefit the individual who performs them. t/f

Which types of electromagnetic waves have higher frequencies than the waves that make up ultraviolet light? check all that apply. radio waves infrared light microwaves gamma rays visible light x-rays