Effect of Price on Demand for Tires Suppose the quantity demanded weekly of the Super Titan radial tires is related to its unit price by the equation
p + x2 = 225
where p is measured in dollars and x is measured in units of a thousand. How fast is the quantity demanded weekly changing when
x = 6,
p = 189,
and the price per tire is increasing at the rate of $2/week? (Round your answer to the nearest tire.)
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