during are experiment are boat sunk after 21 pennies were dropped onto it, during the dropping of pennies the boat started taking on water around 15 pennies and finally sunk after 21.
if the boat is made of a thin piece of aluminum then it will float longer with more weight because it has less resistance against the water.
in conclusion are boat sunk after 21 pennies and the only reason is stayed up that long was because of the marshmallows. my hypothesis was not supported because the shit sunk way quicker than a lot of the other boats with similar designs. the only error I can think of right now is that we made the bottom of the boat too small and the walls too think and didn’t make the surface area big enough to fit the max amount of pennies.