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The table shows the change in the amount of food for a male sea otter at a zoo. The zookeeper starts with 100.75 pounds of food and tracks how much the otter eats and any food deliveries.
Day1 was -20.0625, day 2 was -23.375, day 3 was -25.25, day 4 was 75.75. What is the food supply after day 4?