Temperature and Altitude Suppose the Fahrenheit temperature x miles above ground level is given by the formula T(x) = 85 − 19x.
(a) Use the intersection-of-graphs method to estimate the altitudes where the temperature is below freezing. Assume that the domain of T is 0 ≤ x ≤ 6.
(b) What does the x-intercept on the graph of y = t (x) represent?
(c) Solve part (a) symbolically.
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