Economists Define the Disposable Annual Income for an Individual by the Equation

Short Answer

Economists define the disposable annual income for an individual by the equation D = (1 - r)T, where T is the individual's total income and r is the net rate at which he or she is taxed. What is the disposable income for an individual whose income is $35,000 and whose net tax rate is 21%?
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$__________