What are the zeros of f(x)=x^2-6x-16? show work.

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

Select the sequences that are geometric.

If you answer 2+2 you will get over 80 points