Use tables to find the reciprocal of the following numbers: a) 2.555 b) 0.15 c) 3254

$$\frac{1}{2.555} \approx 0.3914$$

The reciprocal is $\boxed{0.3914}$.

$$\frac{1}{0.15} = 6.666...$$

Rounding to four decimal places:

$$\approx 6.6667$$

The reciprocal is $\boxed{6.6667}$.

$$\frac{1}{3254} \approx 0.00030731$$

Rounding to four significant figures:

$$\approx 0.0003073$$

The reciprocal is $\boxed{0.0003073}$.