Question

i need the the answer of this Question.

Answer 1

$\frac{3.4 \times 10 {}^{4} \times 5.0 \times {10}^{ - 3} }{2.0 \times {10}^{5} } \\ = \frac{3.4 \times 5 \times {10}^{1} }{2 \times {10}^{5} } \\ = \frac{1.7 \times 50}{100000} \\ = \frac{85}{100000 } \\ = 0.00085 \: or \: 85 \times {10}^{ - 5}$