1,521 millileters is equal to 15.21 deciliters.
In a deciliter, there are 100 milliliters. So, for this problem you would divide 1,521 by 100 to find the equality of milliliters to decimeters. Solving this, would give you 15.21 decimeters.
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Answer:
Step-by-step explanation:

No its not because its a repeating decimal for a number to be a irrational number it has to be non terminating or non repeating
Maybe c or A not completely sure try looking for the one you think it is and try reading it again