Hypothesize how ancient people were able to design and erect enormous artifacts without modern technology. how were these ancient people able to predict cycles?

If an object is moving or in motion

Iwould sure like to answer your question but i honestly just don’t know

Isso9

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.