2.99
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If two resistors with resistances R1 and R2 are connected in parallel, as in the figure, then the total resistance R, measured in ohms (â„¦), is given by 1/R = 1/R1 + 1/R2. If R1 and R2 are increasing at rates of 0.3â„¦/s and 0.2â„¦/s, respectively, how fast is R changing when R1 = 80â„¦/s and R2 = 100â„¦/s?

R2 R