1.3 Exercise 12

Express your answers to problems in this section to the correct number of significant figures and proper units.

State how many significant figures are proper in the results of the following calculations: (a) $\left(\text{106} . 7\right) \left(\text{98} . 2\right) / \left(\text{46} . \text{210}\right) \left(1 . \text{01}\right)$ (b) $\left(\text{18} . 7\right)^{2}$ (c) $\left(1 . \text{60} \times \text{10}^{- \text{19}}\right) \left(\text{3712}\right)$.