A cup is 6.4 cm tall, not including a 0.6 cm lip. Cups are stacked inside one another. You may want to draw a diagram to help yo

u see how the height of the stack of cups increases. Select the function that represents the height of a stack of cups in terms of the number of cups in the stack. Select a Value The number of cups in a 18.4 cm high stack is: Select a Value

If you think about how it works when cups are stacked. you will begin with the height of the cup plus the height of the lip you would then add just the heigt of the lips until you get to the height needed. so your answer should be 19 cups