Explain how you calculate 9% of $505.00? And what is the answer?

Which is the graph of the function y=2(4)^x

Two lines that do not intersect are skew. always sometimes or never

During a bike challenge riders have to collect various colored ribbons each 1/2 mile they collect a red ribbon each eighth mile they collect a green ribbon and each quarter mile they collect a blue ribbion wich colors of ribion will be collected at the 3/4 markrer