velocity =−12i + 21.5j m/s, how fast is it moving?

Physics for Scientists and Engineers
10th Edition
ISBN:9781337553278
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter1: Physics And Measurement
Section: Chapter Questions
Problem 26P: Review. Prove that one solution of the equation 2.00x43.00x3+5.00x=70.0 is x = 2.22.
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If velocity =−12i + 21.5j m/s, how fast is it moving? (Express the answer to two significant figures).

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