Find r'(t), r"(t), and r'(t) · r"(t). r(t) = (t2 + 9t)i - 4t²j (a) r'(t) (b) r"(t) (c) r'(t) · r"(t)

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Q: Find r'(t), r"(t), and r'(t) · r"(t). r(t) = (t2 + 6t)i - 9t2j (a) r'(t) (b) r"(t) (c) r'(t) r"(t)

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