Machine P and Machine Q are each used to manufacture 550 sprockets. It takes Machine P 10 hours longer to produce 550 sprockets than Machine Q. Machine Q produces 10% more sprockets per hour than Machine A. How many sprockets per hour does Machine A produce?	Choose the correct answer:
A) 5 B) 15 C) 55 D) 95 E) 125
P makes x sprockets per hour.   Then Q makes 1.1x sprockets per hour.   550/x = 550/1.1x + 10   1.1(550) = 550 + 11x   11x = 55   x = 5   The answer is 5.
<result>A</result>
Machine P and Machine Q are each used to manufacture 550 sprockets. It takes Machine P 10 hours longer to produce 550 sprockets than Machine Q. Machine Q produces 10% more sprockets per hour than Machine A. How many sprockets per hour does Machine A produce?