Answers

Answers

1) R= 9.5÷0.00046
       = 20652.1739......
       = 21000.0 (1.s.f)
       = 2.1
         = 2.1×10⁴
 
2) R= 135÷ 5.2× 10⁶
        = 135 ÷ 5200000
        = 0.000025961......
        = 0.000026 (2.s.f)
        = 2.6×10⁴
 
3) R= 6.5 ×10⁵ ÷ 1.23
        = 650000÷ 1.23
        = 528455.28....
        = 530000.00 (2.s.f)
        = 5.3×10⁵

4) R= 9.46×10⁴ ÷ 2.56×10¯³
        = 94600÷ 0.00256 
        = 36953125
        = 37000000 (2.s.f)
        = 3.70× 10⁷

5) R= 24÷0.003886
        = 6176.0164.....
        = 6.2 (2.s.f)
        = 6.2×10³