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1. A projectile is fired at 820 m⁄sec and an angle of 60°. How long does...

1. A projectile is fired at 820 m⁄sec and an angle of 60°. How long does it take for the projectile to travel 123 km downrange?

2. Find r,T,N,B,and κ at the given value of t r(t) = (3cost)i + (4cost)j + (5sint)k, t = ?/2

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