Sb-29 when a sailboat overtakes a powerboat, which vessel is the stand-on vessel?

Powerboat. When a sailboat overtakes a powerboat, the powerboat is the stand-on vessel. In the Navigational rules, the boat that overtakes another one is the "give-way vessel" and the boat being overtaken is the "stand-on vessel". Any vessel overtaking another must stay away from the vessel being overtaken.

Rules of the Road (Collision Regulations) spell out which vessel is the Stand-on vessel and which vessel is the Give-way vessel. They also explain actions to take for crossing, meeting and overtaking.

giant impact theory - the moon was formed from the collision between earth and another mars-sized body.

colliding planetesimals hypothesis - the moon was formed from the same cloud of material as earth.

capture hypothesis - the moon was locked into orbit by earths gravity as it was passing by it.

accretion hypothesis - the moon was formed from collisions and combining of planetesimals.

i think this is right, if not and you know better let me know.

i have to go with a for this one