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Answer:
1 scoop
Step-by-step explanation:
There are 16 tablespoons in 1 cup, so Xander uses (1/8)ยท(16 tbsp) = 2 tbsp of topping for each scoop of ice cream.
For 1 scoop of ice cream, Pedro will use 1+1 = 2 tbsp of topping.
Hence, both use the same amount of topping (2 tbsp) for 1 scoop of ice cream.