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If two resistors with resistances R1 and R2 are connected in parallel, as in the figure...

If two resistors with resistances R1 and R2 are connected in parallel, as in the figure below, then the total resistance R, measured in ohms (Ω), is given by

1
R

=

1
R1

+

1
R2

.

If R1 and R2 are increasing at rates of 0.3 Ω/s and 0.2 Ω/s, respectively, how fast is R changing when R1 = 50 Ω and R2 = 60 Ω? (Round your answer to three decimal places.)

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