In which type of system is power held solely by the central government and not shared with regional governments? group of answer choices federal unitary confederate oligarchic

Which units can be used to measure length or distance? check all that apply. gram meter kilometer liter inch

Which statement is best supported by the information in the chart? wave y is moving the fastest. wave x is moving the fastest. all of the waves are moving at the same speed. all of the waves have the same value of wavelengths per second.

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?