Question

Use the reciprocal, square and square-root tables to evaluate to 4 significant figures the expression. 

Answer 1

(2.456 × 10¹)⁻¹
0.4072 × 10⁻¹ 
0.04072
4.346² = 18.89
√(18.89 + 0.04072)
=√18.93
√(0.1893 × 10²) 
=0.4351 × 10¹ 
=4.351