8 \, \text{m/s} \), \( \alpha = 40^\circ \), and \( \theta = 40^\circ \).
Substitute the values:
\( t = \frac{2 \times 2.8 \times \sin(40^\circ)}{9.8 \times \cos(40^\circ)} \)
\( t = \frac{2 \times 2.8 \times 0.6428}{9.8 \times 0.766} \)
\( t = \frac{3.6}{7.508}
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