you will need 283 cups to sell all of the lemonade. but the last cup will be a little less than half full.

Step-by-step explanation:

to find the volume of a cone use the equation πr^2 h/3

then plug in the radius which is 4 (diamiter divided by 2) and the hight of the cup which is 12. and the volume of the cone is 201.06 cm cubed. 1 gallon is 3785 cm cubed so do 3785 divided by 201.06 and you get 18.83. that is how many cone cups it will take for the gallon of lemonade. then multiply that by 15 and you get 282.46 cups. it will take 282 cups and all of the cups will be full. and 283 cups for all of the lemondae but one of the cups will only be half full. could i get brainliest? :)