This one should work for all of the test cases except that you have some numerical precision issues with the last test case. Please replace it with a numerical comparison that takes into account precision (my code is returning numbers with no decimal point but the test code returns something less pretty).
Volume of this donut
Getting the absolute index from a matrix
Make a 1 hot vector
Calculate Alcohol By Volume with Original and Final Gravity
Is the input divisible by 3?
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