Eliminate the parameter to obtain an equation in x and y and describe the curve.x = t - 3, y = t2 + 5; -1 ? t ? 2
A. y = x2 - 14; portion of a parabola
B. y = x2 - 6x - 14; portion of a parabola
C. y = x2 + 14; portion of a parabola
D. y = x2 + 6x + 14; portion of a parabola
Answer: D
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A. 
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Solve the equation. Round to the nearest tenth, if necessary.If an object is thrown upward from the ground with an initial velocity of 48 ft/sec, its height after t seconds is given by h = 48t - 16t2. Find the maximum height attained by the object. (The object will attain maximum height exactly at the halfway point in terms of the time t, where t = 0 is at the beginning of the object's flight, and the final time is when the object hits the ground.)
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