You got the correct answer:
Step 1 - Adjust equation to solve for Turning Period in seconds,
insert the given numerical information into the equation. Reduce
the terms and solve to the resultant that will be the square root
of 4.6 yielding the answer of 2.1 seconds when the square root
operation is completed.
Step 2 - Determine the feet per second by dividing the
circumference of the centrifuge by the turning period then convert
the resulting feet per second into miles per hour.
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