Antonio is buying a stereo, speakers, and amplifiers for his car audio system. He is choosing among 4 models of
stereos and 3 styles of speakers. If he has 36 different choices, how many kinds of amplifiers must there be?

The random variable x is defined as the number marking the sector in which the arrow lands when the spinner in the diagram is spun once.

Which angle of rotation is an angle of rotational symmetry for all figures?

This size running track is usually called a 400 meter track. however if a person ran as close to the inside as possible on the track they would run less than 400 meters in one lap. how far away from the inside border would someone have to run to make one lap equal exactly 400 meters