Just answered: Answer 130 without referring back to the text. Fill in the blank or
Chapter 7, Problem 23(choose chapter or problem)
Answer Problems 1-30 without referring back to the text. Fill in the blank or answer true/false.
If \(\|\mathbf{a}\|=7.2,\|\mathbf{b}\|=10\), and the angle between a and b is \(135^{\circ}\), then \(\mathbf{a} \cdot \mathbf{b}\) = ______.
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