Adjacent angles have no common interior points

What is the volume of the sphere shown below with a radius of 3?

Why do interests rates on loans to be lower in a weak economy than in a strong one

Tim's phone service charges $23.06 plus an additional $0.22 for each text message sent per month. if tim's phone bill was $28.56, which equation could be used to find how many text messages, x, tim sent last month?