The domain of the function are all real numbers greater than or equal to 0.
In its simplest terms, the domain of a function are the values for which the value can be accurately defined.
In this case, the function is a=50(2)^t. Note that there is a value for t for all the values which are real numbers greater than or equal to 0.
Hence, the domain of the function are all real numbers greater than or equal to 0.
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