What expression equals to 3^15

Steve wants to develop a way to find the total cost of any item including sales tax. the sales tax in his city is 6%. his friend jenna writes the expression x + 6x where x is the cost of the item. explain whether her expression is correct based on the situation.

Based on the figures as marked, /\rqs = —

How is the number of vertices for a prism related to the name of the prism