Calculate the result of each of the following problems to the correct number of significant digits: (a) 16.3521 2− 1.4482 7 .085 (b) (92.12 )(0.12 /) − 223.02 (c) 1.41 × 107 − 5.98 × 106 (d) 1.41×10 7 −5 .98 × 106