For each of the mathematical expressions given:
1. Tell the correct number of significant figures for the answer
2. Evaluate the mathematical expression using correct significant figures in the result Number of Significant Figures Result
485/9.231
9.146 - 9.137
29.3/(284 x 4.2)
0.517 / 0.2742
1.842 + 45.2 + 87.55
10.4+3.75 + 274.6