[need math help] Study buddies part #2

In exponential growth functions, the base of the exponent must be greater than 1,how would the function change if the base of the exponent were 1? how would the fiction change if the base of the exponent were between 0and 1

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?

The function v(r)=4/3pir^3 can be used to find the volume of air inside a basketball given its radius. what does v(r) represent