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The sale of sweaters in a town changes with the temperature. If a statistical model predicts that daily sales (in dollars) are determined by the function s = 900 − 100t, where t is the temperature (in degrees Celsius), what is the temperature if sweater sales are at $1,200?
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It gives you the equation for sales, s, in terms of temperature, t. For sales $1200, plug in s = 1200 and solve for t.
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