The sales volume y (in thousands of dollars) is related to advertising expenditures x (in thousands of

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The sales volume y (in thousands of dollars) is related to advertising expenditures x (in thousands of dollars) according to
Y = 200x / x + 10
(a) Is this function discontinuous at any points?
(b) Advertising expenditures x must be nonnegative. Is this function continuous for these values of x?
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