Answered: a) Given a = (7, −6, 4) and b = (3, 8,… | bartleby

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a) Given a = (7, −6, 4) and b = (3, 8, −1), find a ·b and a ×b.
b) A (100 m) long spaceship is travelling at 90% the speed of light. How long is the spaceship as measured
by a stationary observer?

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