Sam joined Workout 24 for fifteen months. How much did he pay total

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.

What is the volume of a cone with a height of 6 cm in the radius of 2 cm

Prove that 16^4-2^13-4^5 is divisible by 11.