Answer
a. $30,\bar{0}00$ V
b. $30,\bar{0}00$ V
Work Step by Step
a. Since the measurement $30,\bar{0}00$ V has 3 significant digits (the most), then it is the most accurate.
b. Since the precision of the measurement $30,\bar{0}00$ V is 100, then it is the most precise measurement. The others values have precisions of 1000, 100,000, and 10,000.
