Answer
a. 0.01 cm
b. 0.005 cm
Work Step by Step
For the measurement $17.00~cm$, we have
a. The precision is $0.01 cm$ (because the last digit $0$ is in the $0.01$ place).
b. The greatest possible error is one-half the precision:
$$0.5\cdot 0.01 \ cm= 0.005 \ cm.$$
