Simplify to a single power of 2: 2^4/ 2^3

Which equations represents circles that have a diameter of 12 units and a center that lies on the y-axis? check all that apply

Sam is a waiter at a local restaurant where he earns wages of $5 per hour sam figures that he also eams about $3 in tips for each person he serves sam works 6 hours on a particular day. if n represents the number of people sam serves that day, which of the following functions could sam use to figure ehis total earings for the do o a. en) = 30 o b. en) = 5n+ 18

Y= a(x-3)squared-1 what is the value of a